ISEE Mathematics Achievement Question 197: Answer and Explanation

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Question: 197

3. 39.9 + 57.3 = (39.9 + 0.1) + (57.3 − x)

x =

A. 0.01
B. 0.1
C. 1.0
D. 1.1

Correct Answer: B

Explanation:

B is correct.

39.9 + 57.3 = (39.9 + 0.1) + (57.3 − x)

39.9 + 57.3 = (40) + (57.3 − x)

97.2 = 40 + (57.3 − x)

57.2 = 57.3 − x

x = 0.1