1. 7 1/2 - (4 3/4 + 1/2)
= 15/2 - (19/4 + 1/2)
= 15/2 - (19 + 2/4)
= 15/2 - 21/4
= 30 - 21/4
= 9/4
= 2 1/4
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1. 7 1/2 - (4 3/4 + 1/2)
= 15/2 - (19/4 + 1/2)
= 15/2 - (19 + 2/4)
= 15/2 - 21/4
= 30 - 21/4
= 9/4
= 2 1/4