Explain the rationale for the decimal multiplication strategy recommended by the text using the decimal fractions 32/100 and 4/10
What will be an ideal response?
The rationale for the decimal multiplication strategy recommended by the text can be illustrated by multiplying the decimal fractions 32/100 and 4/10. The answer (128/1000) would be written as the decimal .128. The original problem would then be written in a decimal form: .32 x .4, and the teacher would point out the three decimal places in the two factors and make three decimal places in the answer. “The total number of decimal places in the factors is the same as the number of decimal places in the answer: .32 has two places; .4 has one place. That’s three decimal places. The answer has three decimal places as well.”
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