43*7.2+28*4.3巧算

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43*7.2+28*4.3巧算
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43*7.2+28*4.3巧算
43*7.2+28*4.3巧算

43*7.2+28*4.3巧算
解43*7.2+28*4.3
=4.3*72+28*4.3
=4.3*(72+28)
=4.3*100
=430

43*7.2+28*4.3
=4.3*(7.2*10+28)
=4.3*100
=430

43*7.2+28*4.3=43*(7.2+2.8)=43*10=430

43*7.2+28*4.3
=43*7.2+2.8*43
=43×(7.2+2.8)
=43×10
=430