Mental math addition and subtraction to 1000
Use mental math strategies, including estimation, to add and subtract whole numbers that add up to no more than 1000. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
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Add.
175 + 176
Answer: 351
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Add.
83 + 84
📘 Worked solution
183 + 84 = 83 + 83 + 184 is one more than 83, so this is a near-double.
2= 166 + 1 = 167Double 83 first, then add 1 more.
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