Adding Decimals Worksheet Page 2

2a. Write 34.6 and 86.59 in expanded form.

2b. Add the expanded numbers from part a.

2c. The number you have right now is not in proper expanded form (for example, you

have a term of 11

, which is improper). Rewrite the number so that it is in proper

expanded form.

2d. Convert the expanded number from part c back to a decimal.

2e. Calculate 34 6 + 86 59 using the standard algorithm.

2f. When you were performing the standard algorithm, what did you do about the fact

that 34.6 has fewer digits than 86.59? How does the expanded form method show that this

is okay?

2g. Compare the places in part b where the expanded form was improper to the places

in part e where you had to carry. What do you notice? Why is this the case?

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