alleryA pupil writes 7 × 8 = 54. Which check shows the mistake?
AEight sevens make 56
B7 + 8 equals 15
CA zero is missing
D54 is an even number
Answer & Solution
Correct answer: A. Eight sevens make 56
1. Order does not matter, so 8 × 7 must equal 7 × 8.
2. Counting eight sevens gives 56.
3. So 54 is wrong.
_Source: Wikipedia, Multiplication table (CC BY-SA 4.0, rev 1379867676), Modern times_
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