6.3x0.4+2.4x0.7能简算吗？
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6.3*0.4+2.4*0.7
＝0.7*9*0.4+2.4*0.7
＝0.7*（巧薯正拦3.6+2.4）
＝孝清者0.7*6
＝4.2
＝0.7*9*0.4+2.4*0.7
＝0.7*（巧薯正拦3.6+2.4）
＝孝清者0.7*6
＝4.2
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=0.7×9×0.4+2.4×0.7
=0.7×3.6+2.4×0.7
=(3.6+2.4)×0.7
=6×0.7
=4.2
=0.7×3.6+2.4×0.7
=(3.6+2.4)×0.7
=6×0.7
=4.2
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6.3×0.4+2.4×0.7
=6.3×0.4+0.4×6×0.7
=0.7×9×0.4+2.4×0.7
=0.7×3.6+2.4×0.7
=0.7×（3.6+2.4）
=0.7×6
=4.2
=6.3×0.4+0.4×6×0.7
=0.7×9×0.4+2.4×0.7
=0.7×3.6+2.4×0.7
=0.7×（3.6+2.4）
=0.7×6
=4.2
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