关于算式81×87+27×39使用简便的方法计算,详细过程如下:
81×87+27×39
=(80+1)×87+27×(40-1)
=80×87+87+27×40-27
=6960+87+1080-27
=(6960+1080)+87-27
=8140+60
=8200
81×87+27×39
=81×87+27×3×13
=81×87+81×13
=81×(87+13)
=81×100
=8100
81*87+27*3*13=81*(87+13)=8100
81x87+27x39
=27x3x87+27x39
=27x(261+39)
=27X300
=8100