拉菲7总代84x12344x5的简便计算方式? 175x48-84x75简边算法
更新时间:2021-10-26 12:16:05 • 作者:TIM •阅读 8473
2.7x0.54x5的简便方法
2.7x0.54x5
=2.7x2.7
=(3x0.9)x(3x0.9)
=9x0.81
=7.29
3.4x7x1.5的简便计算
=3.4x1.5x7
=(3x1.5+0.4x1.5)x7
=(4.5+0.6)x7
=5.1x7
=35.7
12532的简便计算方法
125×32=125×8×4
=1000×4
=4000
77x5 99x7 11x2简便运算
77x5+99x7+11x2
=11x7×5+11×9x7+11x2
=11×(35+63+2)
=11×100
=1100