7.58+12.4*0.45简便运算
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7.58+12.4*0.457.58+6.2x2x0.45=7.58+6.2Ⅹ0.9=7.58+5.58=13.16
咨询记录 · 回答于2022-09-22
7.58+12.4*0.45简便运算
7.58+12.4*0.457.58+6.2x2x0.45=7.58+6.2Ⅹ0.9=7.58+5.58=13.16
7.58+12.4*0.457.58+6.2x2x0.45=7.58+6.2Ⅹ0.9=7.58+6.2x(1-0.1)=7.58+6.2-0.62=7.58+5.58=13.16