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I need a step by step explanation of how to do this problem mentally and quickly:

7 3/4- 1 2/7 - 3/2

User Peixe
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1 Answer

1 vote
first make all the denominators the same
7 3/4 =31/7 = 62/14
1 2/7 = 9/7 = 18/14
3/2 = 21/14
62-18-21=23
so the answer is 23/14 or 1 9/14
User Davesave
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