Question 62

Which calculation does NOT give the product 1.2 × 0.4?

12 × 4 ÷ 100
1.2 × 4 ÷ 10
0.12 × 4
1.2 × 4Bonne réponse

Explication

The product is 0.48 because 12 × 4 = 48 and there are two decimal places in the factors. Calculating 1.2 × 4 without then dividing by 10 gives 4.8, so it treats 0.4 as 4 and is the method that fails.

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Question 62: Which calculation does NOT give the product 1.2 × 0.4? · Decimals and Place Value · Questena