You would like to begin to teach your students how to multiply decimals, and you think that they all have a pretty clear concept of the meaning of decimal numbers. Which would be the best initial approach?
a. go over a few whole-number multiplication problems before introducing the rule that you count the number of places in each of the factors to determine how many decimal places you need in the answer
b. use base-10 blocks or graph paper to demonstrate a few problems while you verbalize the procedure, then have students solve the rest of the problems using the blocks if they still need to do so
c. use base-10 blocks or graph paper to demonstrate a few problems while you verbalize the procedure, then have students write each step as they verbalize it
d. just assign the pages in the text since they all have a good grasp of decimals
c
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