Question

Marrisa added 1.56 and 13.47. She got 29.07. What mistake could Marrisa have made? She forgot to move the decimal point to the left after she added. She lined up the front numbers instead of the decimal places. She lined up the last numbers instead of the decimal places. She didn’t carry correctly between place values.

Answer 1

Answer: She lined up the front numbers instead of the decimal places.

Step-by-step explanation:

A correct addition or subtraction in decimals should be lining up decimal places in order to make sure that you are adding or subtracting in the same place.

1.56 + 13.47=15.03

Hope this helps!! :)

Answer 2

without an explanation your answer is (B) She lined up the front numbers instead of the decimal places.

if you need an explanation here:

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For a problem with a decimal in the numbers, you ALWAYS have to line them up or your answer will be incorrect.

She should have put: 13.47

                                 +  1.56

                                    15.03

therefore, 15.03 would have been her correct answer. :-)