Question

1. How can this model be used to determine 2.3−0.26 ?

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The model shows a total of 2 wholes and 3 tenths. After regrouping 1 tenth into 10 hundredths, there are 2 wholes, ____ tenths, and ____ hundredths. After crossing out 2 tenths and 6 hundredths, there are 2 wholes, ____ tenths, and ___ hundredths remaining. Therefore, the difference of 2.3 and 0.26 is ____

2. Yasmine estimated the difference of 87.71 and 5.8 by rounding each number to the nearest whole.

What was Yasmine's estimate, and what is the actual difference of the numbers?

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Yasmine estimated the difference to be ___. The actual difference is __

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Answer 1

1. 2 wholes is (2) tenths and (10) hundredths

2 wholes is (0) tenths and (4) hundredths

difference of 2.3 and .26 is (2.04)

2. Yasmine estimated the difference to be (82). The actual difference is (81.91)

Explanation: