40加4乘35的简便计算
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/24 03:20:50
3.14²+68.6×1.314=3.14²+68.6×(1+0.314)=3.14²+68.6×1+68.6×0.314=68.6+3.14²+6.86×3.
35×198=35×(200-2)=35×200-35×2=7000-70=693064+64×99=64×1+64×99=64×(1+99)=64×100=640073×301-73=73×301-
34+98×17=34+(100-2)×17=34+100×17-2×17=1700
99*38+38=(99+1)*38=100*383800
67.5x23+450x6.75+675x3.2=675x2.3+4.5x675+675x3.2=675x(2.3+4.5+3.2)=675x(2.3+3.2+4.5)=675x(5.5+4.5)=6
9.6x28.5+0.285x40=9.6x28.5+28.5x0.4=(9.6+0.4)x28.5=10x28.5=285
4.7乘4分之1加0.25乘4.3减1除以4=4.7*1/4+0.25*4.3-1/4=1/4(4.7+4.3-1)=1/4*8=2
47乘9加47=47*(9+1)=47*10=470
450加上450就是2乘以450,那么就可以用450除以9,然后乘以5×2,就得到500.当然要是咬文嚼字,楼上的几种情况都是有可能的.
222×156+211×888=222×156+211×4×222=222×(156+211×4)=222×(156+844)=222×1000=222000
0.94乘2.5加0.094乘75=0.94x2.5+0.94x7.5=0.94x(2.5+7.5)=0.94x10=9.4
650乘56加560乘35=65x560+560x35=(65+35)x560=100x560=56000
0.27×35+0.65×27=27×0.35+0.65×27=27×(0.35+0.65)=27×1=27
24×78+12×44=24×78+12×(2×22)=24×78+24×22=24×(78+22)=24×100=2400
=6.27×3.6+3.78×10×0.36=6.27×3.6+3.78×3.6=(6.27+3.78)×3.6=10.05×3.6=(10+0.05)×3.6=10×3.6+0.05×3.6=36+
55×66+66×77+77×88+88×99=11×5×11×6+11×6×11×7+11×7×11×8+11×8×11×9=11×11×(5×6+6×7+7×8+8×9)=121×200=2420
(22+25)×4=22×4+25×4=88+100=188请点击下面的【选为满意回答】按钮.
91*99+91=91(99+1)=9100再问:看不懂再答:91乘以99加91====91乘以99加91(91=91乘以1)91乘以99加91====91乘以99加91乘以1====91*99+91
425+24*48+76=425+24*(50-2)+(75+1)=425+1000-48+75+1=425+75+1000+1-48=1453
123乘7加627乘7=(123+627)x7=750x7=5250