计算,能简算的要简算.667÷23*11 8/9÷(1/4+2.5*2/5)
问题描述:
计算,能简算的要简算.667÷23*11 8/9÷(1/4+2.5*2/5)
答
667÷23*11
=29×11
=(30-1)×11
=330-11
=319;
8/9÷(1/4+2.5*2/5)
=8/9÷(1/4+1)
=8/9×4/5
=32/45
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