Numbers — Practice Quiz

10

Step 1: We need to find how many tens make 100. Step 2: Each ten is equal to 10. Step 3: Count by tens: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100. Step 4: We counted 10 times to reach 100. Step 5: So 10 tens = 100. There are 10 tens in 100.

107

Step 1: We need to add 100 and 7. Step 2: 100 means 1 hundred, 0 tens, 0 ones. Step 3: Adding 7 to 100 gives us 1 hundred, 0 tens, and 7 ones. Step 4: 1 hundred + 0 tens + 7 ones = 107. Step 5: So 100 + 7 = 107. A common mistake is to write 170, but that would be 100 + 70, not 100 + 7.

2

Step 1: In a three-digit number, there are three places: hundreds, tens, and ones. Step 2: The number 629 can be written in a place value table as: H = 6, T = 2, O = 9. Step 3: The hundreds place (leftmost) has 6. Step 4: The tens place (middle) has 2. Step 5: The ones place (rightmost) has 9. So the digit in the tens place is 2.

100

Step 1: A three-digit number has exactly three digits. Step 2: 9 has only one digit - it is a one-digit number. Step 3: 87 has two digits - it is a two-digit number. Step 4: 45 has two digits - it is a two-digit number. Step 5: 100 has three digits (1, 0, 0) - it is a three-digit number and is also the smallest three-digit number.