Balance equivalent number sentences
Find the missing number that makes two addition or subtraction expressions equivalent, up to 100. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
Try one
Find the missing number that makes both sides equal.
24 + 6 = 26 + ___
Answer: 4
See one solved, step by step
Find the missing number that makes both sides equal.
40 - 24 = 55 - ___
📘 Worked solution
140 - 24 = 16Find the value of the left side first.
255 - ___ = 16, so ___ = 55 - 16Both sides must equal 16, so subtract 16 from 55.
3___ = 39That's the missing number.
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