Concept explainers
Belle knows to move the decimal point in a multiplication problem by counting the number of digits after each factor and then adding them together and putting the decimal point in that spot in the product. She turns in the following problem?
a. Is she correct?
b. What is the danger in teaching such method of decimal multiplication?
c. How can estimating the product help in avoiding mistakes like this?
d. How can decimal grids help Belle get the correct answer?
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Check out a sample textbook solutionChapter 7 Solutions
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
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