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b) 12 3/8-(14 1/2-(8-7/8))=12 3/8-(14 4/8-(7 8/8-7/8)=12 3/8-(14 4/8-7 1/8)=12 3/8 -
7 3/8=5
d)3 1/2-1 1/3-1 1/4+1 1/2+2 1/3-3 1/4=5+1-4 2/4=6-4 2/4=5 4/4-4 2/4=1 2/4=1 1/2