Time and Calendar
ICSE · Class 4 · Mathematics
Flashcards for Time and Calendar — ICSE Class 4 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
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How many hours are there in 5 days?
Answer
1 day = 24 hours<br>5 days = 5 × 24 = 120 hours<br><b>Answer: 120 hours</b>…
Convert 3 hours 45 minutes into minutes.
Answer
1 hour = 60 minutes<br>3 hours = 3 × 60 = 180 minutes<br>3 hours 45 minutes = 180 + 45 = 225 minutes<br><b>Answer: 225 minutes</b>…
Convert 287 seconds into minutes and seconds.
Answer
60 seconds = 1 minute<br>287 ÷ 60 = 4 quotient, remainder 47<br>So, 287 seconds = 4 minutes 47 seconds<br><b>Answer: 4 minutes 47 seconds</b>…
Convert 145 minutes into hours and minutes.
Answer
60 minutes = 1 hour<br>145 ÷ 60 = 2 quotient, remainder 25<br>So, 145 minutes = 2 hours 25 minutes<br><b>Answer: 2 hours 25 minutes</b>…
Convert 96 hours into days and hours.
Answer
24 hours = 1 day<br>96 ÷ 24 = 4 quotient, remainder 0<br>So, 96 hours = 4 days<br><b>Answer: 4 days</b>…
Add: 2 hours 35 minutes and 1 hour 40 minutes.
Answer
<b>Step 1:</b> Add minutes: 35 + 40 = 75 minutes<br>75 minutes = 60 + 15 = 1 hour 15 minutes<br>Write 15 minutes, carry over 1 hour.<br><b>Step 2:</b> Add hours: 2 + 1 + 1 = 4 hours<br><b>Answer: 4 ho…
Add: 3 hours 50 minutes 20 seconds and 2 hours 45 minutes 50 seconds.
Answer
<b>Step 1:</b> Add seconds: 20 + 50 = 70 seconds = 1 minute 10 seconds → carry 1 minute<br><b>Step 2:</b> Add minutes: 50 + 45 + 1 = 96 minutes = 1 hour 36 minutes → carry 1 hour<br><b>Step 3:</b> Add…
Subtract: 5 hours 20 minutes from 8 hours 10 minutes.
Answer
<b>Step 1:</b> Minutes: 10 < 20, so borrow 1 hour (60 minutes)<br>Now: 7 hours 70 minutes<br>70 - 20 = 50 minutes<br><b>Step 2:</b> Hours: 7 - 5 = 2 hours<br><b>Answer: 2 hours 50 minutes</b>…
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