Joe was asked by a stranger to find the answer to the arithmetic problem:
8 + 5 × 2
Joe wrote the following:
8 + 5 × 2 = 13 × 2 = 26
What did Joe do wrong (other than talking to a stranger, of course)? What should the answer be?
Answer
Joe added 8 and 5 first instead of multiplying 5 and 2 first.
8 + 10 = 18
Beth was asked to find 4 – (3 – 5)2. Beth wrote the following:
4 – (-2)2 = 4 – (-4) = 8
What did Beth do wrong? What should the answer be?
She goofed a little on that exponent: (-2)2 should be 4, not -4. The answer should be 4 – 4 = 0. Come on, get it together, Beth.
What is ?
20
12/10 = 1.2
1 1/4 = 1.25
What is (3 + 2 – 1)3 – (-7 + 3)2 × 8?
-64
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