用简便方法计算要过程急求T^T - 知识问答

用简便方法计算要过程急求T^T

1个回答

1、原式=49/50x3/8+1/50x3/8
=(49/50+1/50)x3/8
=1x3/8
=3/8
2、原式=1-5/8÷(3/4+2/4)
=1-5/8÷5/4
=1-5/8x4/5
=1-1/2
=1/2
3、原式=16/21÷(2/12+9/12)
=16/21÷11/12

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