Divide by two-digit numbers
- Age
- Ages 10–11
Long division with 2-digit divisors
For 156 ÷ 12, notice that 12 × 10 = 120, leaving 36. Since 12 × 3 = 36, the quotient is 10 + 3 = 13.
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Try an example
For 156 ÷ 12, notice that 12 × 10 = 120, leaving 36. Since 12 × 3 = 36, the quotient is 10 + 3 = 13. Multiples of the divisor help estimate each digit.
What to check
An estimate that is too high produces an impossible subtraction at that stage; reduce it and multiply again. An estimate that is too low may leave a remainder at least as large as the divisor. Check the complete calculation at the end.
Explain and check
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.