一道有理数的除法.财富100!0.8×2/11+4 - 知识问答

一道有理数的除法.财富100!0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11

6个回答

0.8×2/11+4.8×(—27)—2.2÷37+2.2÷37+0.8×911
=0.8×2/11+0.8×9/11-4.8×2/7
=0.8×(2/11+9/11)-4.8×2/7
=0.8-9.6/7
=5.6/7-9.6/7
=-4/7

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