3.28×3/4+1.72×3/4-0.75 - 知识问答

3.28×3/4+1.72×3/4-0.75

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3.28×3/4+1.72×3/4-0.75
=(3.28+1.72-1)×3/4
=4×3/4
=3
34又4分之1÷4分之5
=(33+4分之5)×5分之4
=33×5分之4+1
=5分之132+1
=5分之137

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