Adding Decimals Worksheet Page 4
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42a. Write 49.2 and 23.78 in expanded form.
2b. Rewrite the problem (by distributing the minus) so that it is instead a problem about
adding negative fractions.
2c. Add the expanded numbers from part b (do not reduce).
2d. Convert the expanded number from part c back to a decimal.
2e. Calculate 49 2
23 78 using the standard algorithm.
2f. When you were performing the standard algorithm, what did you do about the fact
that 49.2 has fewer digits than 23.78? How does the expanded form method show that this
is okay?
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