1.27x8.6+0.73x8.6
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亲亲,这道题解题过程如下1.27x8.6+0.73x8.6=(1.27+0.73)×8.6=2×8.6=17.2
咨询记录 · 回答于2023-01-03
1.27x8.6+0.73x8.6
亲亲,这道题解题过程如下1.27x8.6+0.73x8.6=(1.27+0.73)×8.6=2×8.6=17.2
x+0.4X-0.28=3.5
计算时提取公因式8.6,先算括号里的更为简便
x+0.4X-0.28=3.51.4x=3.5+0.281.4x=3.78x=3.78÷1.4x=2.7
4 .2x-1.2x2.8=0
4 .2x-1.2x2.8=04.2x=3.36X=3.36÷4.2X=0.8