0.38×6.2-0.12×3.8简便计算,
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![0.38×6.2-0.12×3.8简便计算,](/uploads/image/z/131277-21-7.jpg?t=0.38%C3%976.2%EF%BC%8D0.12%C3%973.8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C)
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0.38×6.2-0.12×3.8简便计算,
0.38×6.2-0.12×3.8简便计算,
0.38×6.2-0.12×3.8简便计算,
1.9
0.38×(6+0.2)-0.12×(4-0.2)=0.38×6+0.38×2-0.12×4-0.12×0.2=2.28+0.76-0.48-0.024
原式=0.38×6.2-0.38×1.2=0.38×(6.2-1.2)=0.38×5=1.9