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Questions and Answers
What strategy involves expanding a multiplication problem into simpler ones?
What strategy involves expanding a multiplication problem into simpler ones?
- Rewriting a number as a fraction
- Multiplying by 10
- Expanding the number and breaking it down (correct)
- Dividing the number by 2
How does the text suggest making the multiplication of a number by 5 easier?
How does the text suggest making the multiplication of a number by 5 easier?
- Rewrite 5 as 2 x 3
- Multiply the number by 100
- Perform an addition operation instead of multiplication
- Rewrite 5 as 10 / 2 (correct)
Why is multiplying by 9 suggested to be easy in the text?
Why is multiplying by 9 suggested to be easy in the text?
- Because it involves division instead of multiplication
- Because it can be rewritten as a fraction
- Because 9 is one less than ten (correct)
- Because 9 is one more than ten
In the expression 5 x 22, what is the first step suggested in the text to simplify the calculation?
In the expression 5 x 22, what is the first step suggested in the text to simplify the calculation?
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How does the text recommend simplifying the expression (81 x 10) - (81 x 1) when multiplying by 9?
How does the text recommend simplifying the expression (81 x 10) - (81 x 1) when multiplying by 9?
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