3.8+2.2×(0.7×0.3)简便运算

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3.8+2.2×(0.7×0.3)简便运算3.8+2.2×(0.7×0.3)简便运算3.8+2.2×(0.7×0.3)简便运算3.8+2.2×(0.7×0.3)=3.8+2.2*0.21=3.8+(2

3.8+2.2×(0.7×0.3)简便运算
3.8+2.2×(0.7×0.3)简便运算

3.8+2.2×(0.7×0.3)简便运算
3.8+2.2×(0.7×0.3)
=3.8+2.2*0.21=3.8+(2+0.2)*0.21=3.8+0.42+0.042=4.22+0.042=4.262