Tính a) 3/4 x 1/2 + 3/4x1/5 b) 3/5+ 1/2 x 2/3-1/4 c) 7/15 + 4/5 D) 4/5 x 5/8 e) 2/3 - 3/8

Tính a) 3/4 x 1/2 + 3/4x1/5 b) 3/5+ 1/2 x 2/3-1/4 c) 7/15 + 4/5 D) 4/5 x 5/8 e) 2/3 - 3/8
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