巧思妙算 0.75x4.3+2.5x0.43
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0.75x4.3+2.5x0.43
=0.75×0.43×10+2.5×0.43
=(0.75×10+2.5)×0.43
=(7.5+2.5)×0.43
=10×0.43
=4.3
=0.75×0.43×10+2.5×0.43
=(0.75×10+2.5)×0.43
=(7.5+2.5)×0.43
=10×0.43
=4.3
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0.75x4.3+2.5x0.43
=0.75×4.3+0.25×4.3
=(0.75+0.25)×4.3
=1×4.3
=4.3
=0.75×4.3+0.25×4.3
=(0.75+0.25)×4.3
=1×4.3
=4.3
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0.75x4.3+2.5x0.43
=7.5x0.43+2.5x0.43
=0.43x(7.5+2.5)
=0.43x10
=4.3
=7.5x0.43+2.5x0.43
=0.43x(7.5+2.5)
=0.43x10
=4.3
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展开全部
0.75x4.3+2.5x0.43
=0.75x0.43+0.25x0.43
=(0.75+0.25)0.43
=0.43
=0.75x0.43+0.25x0.43
=(0.75+0.25)0.43
=0.43
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