Solve ten subtraction questions, from familiar differences to ones that cross a ten.
Subtraction within 100
Your subtraction round
Ten questions with clear feedback, beginning gently and building to crossing ten.
Subtraction within 100Question 1 / 10
0 / 10
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14 − 13 =
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Round complete.
Correct first time: 0 / 10
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Split off a useful part
For 76 − 24, subtract 20 first to get 56, then subtract 4 to get 52. Breaking 24 into 20 and 4 keeps the subtraction manageable.
Bridge through a ten
For 53 − 18, subtract 3 to reach 50, then subtract the remaining 15 to reach 35. Check with the inverse: 35 + 18 = 53. A difference cannot be larger than the starting number in this round.
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