1.2乘以8.9再减去7.9的简便方法怎么做
1.2乘以8.9再减去7.9的简便方法怎么做
1.2×8.9-7.9
=1.2×(1+7.9)-7.9
=1.2+1.2×7.9-7.9
=1.2+7.9×(1.2-1)
=1.2+7.9×0.2
=1.2+1.58
=2.78
4×8再乘以25再减去125用简便方法怎么做
4×8再乘以25再减去125用简便方法怎么做
4×8再乘以25再减去125
=8*(4*25)-125
=800-125
=675
17乘以43再减去43的简便方法怎么算
17乘以43再减去43
=43×(17-1)
=43×16
=688
382乘以101再减去382 用简便方法怎么算
382*101-382=382*(101-1)=38200
56乘以100再减去99简便方法怎么算式
56*100-99
=(55+1)*100-99
=55*100+100-99
=55*100+1
=5501
183乘以36减去73乘以二十六,再减去360的简便方法
解:183×36-73×26-360
=(183×36-360)-73×26
=(183×36-36×10)-73×26
=36×(183-10)-73×26
=36×173-73×26
=36×(100+73)-73×26
=3600+73×36-73×26
=3600+73×(36-26)
=3600+730
=4330
总结:简便运算时,多使用加减乘除的运算定律。
11乘以110再承以1.1再减去11承以1的简便方法
原式
=11x110x1.1-11x1
=11x11x11-11x1
=11x121-11
=11x(121-1)
=11x120
=1320
供参考。
6,33乘以101再减去6,33的简便方法怎么写
6.33×101-6.33=6.33×(101-1)=6.33×100=633请采纳本答案
101乘以99减去99用简便方法怎么做
101× 99 - 99= 99 × 101 - 99 × 1= 99 ×(101 - 1)= 99 × 100 = 9900