Making 10 (Numbers 10 to 20)
CBSE · Class 1 · Mathematics
NCERT Solutions for Making 10 (Numbers 10 to 20) — CBSE Class 1 Mathematics.
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Making 10 — Dotty Bug and her Designs
AWrite the number of dots on each bug. (Four ladybug images are shown.)Show solution
Concept: Count each dot carefully on every bug and write the number.
Working:
- Bug 1: Count all the dots on its body → dots
- Bug 2: Count all the dots on its body → dots
- Bug 3: Count all the dots on its body → dots
- Bug 4: Count all the dots on its body → dots
(Note: Exact dot counts depend on the printed images. The method is to count each dot one by one and write the total number below each bug.)
Final Answer: Write the counted number below each bug.
BMake some dot designs with objects like tamarind seeds, pebbles, buttons, bindis, etc., and identify the number of dots in each arrangement.Show solution
Concept: Arrange objects in a pattern and count them to identify the number.
Working:
- Collect small objects such as tamarind seeds, pebbles, buttons, or bindis.
- Place them in a pattern (for example, a circle, a line, or a triangle).
- Count each object in the arrangement carefully.
- Write the number that tells how many objects are in the design.
Example: If you place pebbles in a circle, the number of dots (objects) in that arrangement is .
Final Answer: The number you write will depend on how many objects you use in your design. Count carefully and write the correct number.
CIdentify and write the numbers formed by the arrangement of the red bindis.Show solution
Concept: Look at the pattern of bindis and recognise which number (1–10) the arrangement represents, similar to dot patterns on dice.
Working:
- Look at each group of red bindis carefully.
- Count the total number of bindis in each group.
- Write the number that matches the count.
Example: If one arrangement has (3 bindis), write .
(Note: The exact numbers depend on the printed bindi arrangements in the image. Use the counting method above for each arrangement.)
Final Answer: Write the number that matches the count of red bindis in each arrangement.
DPlay with your friend. Roll the dice and colour a box with the same number of dots as on the dice. Take turns with your friend and roll again. The child with more number of coloured boxes will win.Show solution
Concept: Match the number of dots on the dice to the number on the grid and colour the corresponding box.
How to play:
1. Choose your colour and your friend chooses a different colour. Fill in the colour boxes provided.
2. Roll the dice. Count the dots on the top face of the dice.
3. Find the box on the grid that shows that number and colour it with your colour.
4. Your friend rolls the dice and colours a box with their colour.
5. Keep taking turns until all boxes are coloured.
6. At the end, count how many boxes each player has coloured.
Final Answer: The player who has coloured more boxes wins the game. This activity helps in recognising numbers to instantly (subitization).
Vanishing Buttons — Zero Concept
Story ActivityWrite the number of birds sitting on the branch of the tree. (A series of tree images is shown with different numbers of birds.)Show solution
Concept: Count the birds on each branch carefully and write the number.
Working:
- Look at each tree image one by one.
- Count every bird sitting on the branch.
- Write the number below or beside each image.
Example sequence (based on the vanishing/reducing pattern of the story):
- Image 1: birds
- Image 2: birds
- Image 3: birds
- Image 4: bird
- Image 5: birds
(Note: Count the birds in each picture carefully. The number may go from a higher number down to zero, just like the buttons in the Gola monkey story.)
Final Answer: Write the counted number of birds for each image. Remember, if no birds are sitting, the answer is (Zero).
Think and Tell AHow many suns do you see in the night?Show solution
Concept: The Sun is not visible at night because it is on the other side of the Earth.
Answer: We see (Zero) suns in the night.
This is an example of zero — when something is completely absent, its count is zero.
Think and Tell BHow many moons do you see at noon?Show solution
Concept: The Moon is generally not visible during the day (at noon) because the bright sunlight makes it very hard to see.
Answer: We see (Zero) moons at noon.
This again shows the concept of zero — the count of something that is not present or not visible is zero.
Tenth Birthday — Counting to 10
Count and WriteShe has lighted diyas on her birthday. Count and write the number of objects: Beads, Laddoos, Crayons, Bananas, Leaves.Show solution
Concept: Count each group of objects carefully and write the total number. All groups should total as the theme is Aastha's 10th birthday.
Working:
- Beads: Count each bead on the string →
- Laddoos: Count each laddoo →
- Crayons: Count each crayon →
- Bananas: Count each banana →
- Leaves: Count each leaf →
Final Answer:
Let us Do — Making 10
ACount and draw beads to make a string of 10 beads. (Four strings with some beads already drawn are shown.)Show solution
Concept: is the target. Count the beads already on the string, then draw the remaining beads.
Formula: Beads to draw Beads already on string.
Working (general method for each string):
- String 1: If beads are drawn, draw more beads.
- String 2: If beads are drawn, draw more beads.
- String 3: If beads are drawn, draw more beads.
- String 4: If beads are drawn, draw more beads.
(Note: Count the beads in each printed string and draw the exact number needed to reach .)
Final Answer: Each completed string must have exactly beads.
BDraw buttons to make a ten frame of buttons. (Five ten-frames with some buttons already drawn are shown.)Show solution
Concept: A ten-frame holds exactly objects. Count the empty boxes and draw a button in each empty box.
Formula: Buttons to draw Buttons already in frame.
Working (general method):
- Frame 1: If buttons are placed, draw more buttons.
- Frame 2: If buttons are placed, draw more buttons.
- Frame 3: If buttons are placed, draw more buttons.
- Frame 4: If buttons are placed, draw more buttons.
- Frame 5: If buttons are placed, draw more button.
(Note: Count the buttons already in each frame and fill the remaining empty boxes.)
Final Answer: Each ten-frame must be completely filled with buttons.
The Handy Five and Ten — Number Pairs
Pattern ActivityFollow the pattern and write the number pairs separated by the stick (number pairs of 5).Show solution
Concept: Two numbers that together make are called number pairs of .
Working — All pairs of :
Final Answer: The number pairs of are: .
Let us PlayShow 3 fingers. Your friend has to show some fingers to make it 5.Show solution
Concept: We need to find how many more fingers make .
Working:
Final Answer: The friend has to show fingers to make it .
Number Pairs of 10
Pattern ActivityFollow the pattern and write the number pairs in the given table (number pairs of 10, using the finger game with both hands).Show solution
Concept: Two numbers that together make are called number pairs of .
Working — All pairs of :
Final Answer: The number pairs of are:
.
Counting up to 20
Number Names TableLearn and complete the table: 10 and 1 is ___, 10 and 2 is ___, ... 10 and 10 is ___.Show solution
Concept: Numbers from to are formed by taking and adding to it.
Working:
Final Answer: The numbers to are formed by adding through to .
Write the NumbersWrite the numbers 11–20 by following the given table pattern.Show solution
Concept: Practice writing numbers to in order.
Working — Numbers in order:
Final Answer: Fill in the table by writing each number from to in the correct boxes, following the pattern shown.
Count and Write
ACount and write the answers. (Images of objects grouped in tens and units are shown.)Show solution
Concept: Count the full group of first, then count the extra ones and add them.
Working (general method):
- Count the objects in the full box/group: that gives .
- Count the remaining loose objects: that gives the units.
- Add: units the total number.
Example: If there is full group of and extra objects:
Final Answer: Write the total count for each image using the method above.
BColour the tens frames to show the number. (Numbers between 11 and 20 are given; two ten-frames are shown for each number.)Show solution
Concept: Numbers – have ten and some units. Colour boxes in the first frame and the remaining units in the second frame.
Working (example for ):
-
- Colour all boxes in the first ten-frame.
- Colour boxes in the second ten-frame.
General rule for any number where :
- First ten-frame: colour all boxes.
- Second ten-frame: colour boxes.
Final Answer: Colour the ten-frames according to the number given, always filling the first frame completely and the second frame partially.
CWrite down the numbers in sequence. (Two sequences with missing numbers are shown.)Show solution
Concept: Numbers from to follow a fixed order. Each number is more than the previous number.
Working:
- Sequence 1 (example): → Missing number
- Sequence 2 (example): → Missing numbers and
(Note: Fill in the blanks by identifying which numbers are missing from the sequence to .)
Final Answer: Write the missing numbers so that the sequence is in the correct order from smallest to largest.
DEncircle a group of ten in the pictures and match with the number.Show solution
Concept: To count objects beyond , first circle a group of , then count the remaining ones and add.
Working:
- Look at the picture and draw a circle around any objects.
- Count the objects left outside the circle.
- Total remaining objects.
- Draw a line to match the picture with the correct number on the right.
Example: If a picture has circled remaining , match it to .
Final Answer: Circle the group of in each picture and draw a matching line to the correct number.
E (i)Tick the tallest tower. (Images of towers made of blocks are shown.)Show solution
Concept: The tallest tower is the one with the most number of blocks stacked on top of each other.
Working:
- Look at all the towers.
- Count the blocks in each tower.
- The tower with the highest count is the tallest.
Final Answer: Put a tick mark (✓) on the tower that has the most blocks (is the tallest).
E (ii)Which tower used the most number of blocks? Write the number of blocks used in it.Show solution
Concept: The tower with the most blocks is the tallest one.
Working:
- Count the blocks in each tower carefully.
- Identify the tower with the highest count.
- Write that number.
Final Answer: Write the number of blocks in the tallest tower. (Count the blocks in the tallest tower from the image and write the number.)
E (iii)Which tower used the least number of blocks? Write the number of blocks used in it.Show solution
Concept: The tower with the fewest blocks is the shortest one.
Working:
- Count the blocks in each tower carefully.
- Identify the tower with the lowest count.
- Write that number.
Final Answer: Write the number of blocks in the shortest tower. (Count the blocks in the shortest tower from the image and write the number.)
Let us Do — Comparing Numbers 1 to 20
A (i)Circle the smallest number: 8, 12, 6Show solution
Concept: The smallest number is the one that is least in value.
Working:
6 < 8 < 12
The smallest number is .
Final Answer: Circle .
A (ii)Circle the smallest number: 14, 11, 19Show solution
Concept: Compare the numbers and find the least.
Working:
11 < 14 < 19
The smallest number is .
Final Answer: Circle .
B (i)Circle the biggest number: 16, 19, 11Show solution
Concept: The biggest number is the one with the greatest value.
Working:
11 < 16 < 19
The biggest number is .
Final Answer: Circle .
B (ii)Circle the biggest number: 11, 17, 9Show solution
Concept: Compare the numbers and find the greatest.
Working:
9 < 11 < 17
The biggest number is .
Final Answer: Circle .
C (i)Find the numbers hidden under the paw: ___, 15, 16, ___, 18Show solution
Concept: Numbers follow a pattern where each number is more than the previous.
Working:
- The number before is .
- The number between and is .
Final Answer: The complete sequence is .
C (ii)Find the numbers hidden under the paw: ___, 12, ___, 14, 15Show solution
Concept: Each number is more than the previous.
Working:
- The number before is .
- The number between and is .
Final Answer: The complete sequence is .
C (iii)Find the numbers hidden under the paw: 15, ___, ___, ___, ___, 19Show solution
Concept: Each number is more than the previous.
Working:
The four missing numbers are (and the sequence ends at ).
Final Answer: The complete sequence is .
C (iv)Find the numbers hidden under the paw: 13, ___, 15, ___, ___, ___Show solution
Concept: Each number is more than the previous.
Working:
Final Answer: The complete sequence is .
DWrite the numbers from the biggest to the smallest: 11, 3, 16, 20, 13, 9Show solution
Concept: Arranging numbers from biggest to smallest is called descending order.
Working — Compare all numbers:
20 > 16 > 13 > 11 > 9 > 3
Final Answer:
E (i)Count and write the number of blocks. (An image of blocks is shown.)Show solution
Concept: Count all the blocks carefully, grouping by tens if possible.
Working:
- Count the blocks one by one (or group and count the rest).
- Write the total.
(Note: Count the blocks in the printed image. The answer will be a number between and .)
Final Answer: Write the total number of blocks counted.
E (ii)Count and write the number of white dots. (An image with white dots is shown.)Show solution
Concept: Count all the white dots carefully.
Working:
- Count each white dot one by one.
- Write the total number.
(Note: Count the white dots in the printed image. The answer will be a number between and .)
Final Answer: Write the total number of white dots counted.
FJoin the numbers from 1 to 20. Is it an animal or a bird?Show solution
Concept: Join the dots in order from to to reveal a hidden picture.
Working:
- Start at dot .
- Draw a line to dot , then to , then to , and so on.
- Continue until you reach dot .
- Look at the shape formed.
Final Answer: When you join all the dots from to in order, a picture is revealed. Based on the shape, identify whether it is an animal or a bird and write your answer. (The picture formed is likely a bird such as a duck or a fish/animal — identify from the completed dot-to-dot drawing.)
Project Work
AFind out the things from your surroundings that are in the group of 10. For example, bindi cards having bindis in the groups of 10.Show solution
Concept: Many everyday objects come in groups of .
Working — Examples of things found in groups of :
1. Bindi cards — bindis arranged in rows of .
2. Fingers on both hands — fingers in total.
3. Toes on both feet — toes in total.
4. A packet of pencils or crayons.
5. Eggs in a carton (some cartons hold eggs).
6. rupee notes in a bundle.
Final Answer: Look around your home, school, and surroundings. Find at least – things that come in a group of and write or draw them.
BAsk children to make their own number cards 10 to 20. They can use old cardboards, waste materials, etc.Show solution
Concept: Making number cards helps in recognising and remembering numbers to .
Working — Steps to make number cards:
1. Collect old cardboard pieces or thick paper.
2. Cut them into equal-sized rectangles (like playing cards).
3. On one side, write the number (e.g., ).
4. On the other side, draw dots or paste objects (like seeds or buttons) to show that number.
5. Make one card for each number from to — that is cards in total.
6. Decorate the cards with colours.
Final Answer: You will have number cards showing numbers . Use them to play matching games and practise counting.
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- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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