Show model answer and explanation
63
6 + 7 = 13. Carry 1 ten; 3 + 2 + 1 = 6 tens.
Class 2 · English Version · Mathematics
Addition and subtraction with regrouping
Exchange ten ones for one ten and explain each written step.
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Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
Line up the places. Ten ones have the same value as one ten. Regrouping changes the way a number is shown, not its value.
Worked example
47 + 28: 7 + 8 = 15 ones. Write 5 ones and carry 1 ten. 4 + 2 + 1 = 7 tens. The answer is 75.
- For 52 − 18, exchange one ten: 52 becomes 4 tens and 12 ones.
- 12 − 8 = 4 ones; 4 − 1 = 3 tens. So 52 − 18 = 34. Check: 34 + 18 = 52.
Your written practice
Show your working on paper. Check your answer, then choose Next.
Show model answer and explanation
35
Exchange: 5 tens and 13 ones. 13 − 8 = 5; 5 − 2 = 3.
Show model answer and explanation
35
Subtract 19 from 54, then check 35 + 19 = 54.
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