1.43×9.9+1.43怎样简便运算
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1.43×9.9+1.43
=1.43×(10-0.1)+1.43
=1.43×10-1.43×0.4+1.43
=14.3-0.143+1.43
=15.73-0.143
=15.587
=1.43×(10-0.1)+1.43
=1.43×10-1.43×0.4+1.43
=14.3-0.143+1.43
=15.73-0.143
=15.587
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