Horizontal 2-digit subtraction, no regrouping
- Age
- Ages 6–7
For 47 − 23, subtract the ones, 7 − 3 = 4, and the tens, 4 − 2 = 2, without exchanging a ten.
For 47 − 23, subtract the ones, 7 − 3 = 4, and the tens, 4 − 2 = 2, without exchanging a ten. The answer is 24. Representing four tens and seven ones makes the removal visible.
Keep the order of the numbers in each column. If a column requires subtracting a larger digit from a smaller one, use regrouping or another strategy. Check by adding the difference and subtrahend: 24 + 23 = 47.
Work through one example aloud before independent practice. To check 18 + 7 = 25, calculate 25 − 7. If a word problem asks about meters or coins, include that unit and check whether the answer fits the situation.