Mental math to 50
Use mental math strategies, including estimation, to add and subtract whole numbers up to 50. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
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Add.
2 + 3
Answer: 5
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Add.
15 + 16
📘 Worked solution
115 + 16 = 15 + 15 + 116 is one more than 15, so this is a near-double.
2= 30 + 1 = 31Double 15 first, then add 1 more.
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