48x52x2-4x28怎么简便计算?
2个回答
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提取岩肆公因数后计算大拆即可:
解:滚枣枣48x52x2-4x28
=4x4x3x4x13x2-4x4x7
=4x4x(3x4x13x2-7)
=16x(312-7)
=16x205
=16x200+16x5
=3200+80
=3280
解:滚枣枣48x52x2-4x28
=4x4x3x4x13x2-4x4x7
=4x4x(3x4x13x2-7)
=16x(312-7)
=16x205
=16x200+16x5
=3200+80
=3280
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