36x97-25x27+28x27,怎样简便?
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解析:依题意可得,
36×97-25×27+28×27
=36×(100-3)+27×(28-25)
=36×100-36×3+27×3
=3600-(36-27)×3
=3600-9×3
=3600-27
=3573
36×97-25×27+28×27
=36×(100-3)+27×(28-25)
=36×100-36×3+27×3
=3600-(36-27)×3
=3600-9×3
=3600-27
=3573
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简便计算如下:
=36×(100-3)+27×(28-25)
=36×100-36×3+27×3
=3600-3×(36-27)
=3600-3×9
=3600-27
=3573
=36×(100-3)+27×(28-25)
=36×100-36×3+27×3
=3600-3×(36-27)
=3600-3×9
=3600-27
=3573
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36*97-25*27+28*27
=36*97+(28-25)*27
=36*(100-3)+3*27
=3600-36*3+3*27
=3600-(36-27)*3
=3600-9*3=3600-27=3573
=36*97+(28-25)*27
=36*(100-3)+3*27
=3600-36*3+3*27
=3600-(36-27)*3
=3600-9*3=3600-27=3573
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