作业帮5.45 0.65X4.7的简便运算方法
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 06:12:38
8.9X9.9+11X0.99=89X0.99+11X0.99=0.99X（89+11）=0.99X100=993.46X1.23+3.46X4.56+5.79X6.54=3.46X（1.23+4.5
1/1x4+1/4x7+1/7x10+1/10x13+1/13X16=(1/3)×[(1-1/4)+(1/4-1/7)+(1/7-1/10)+(1/10-1/13)+(1/13-1/16)]=(1/3
1/(1x4)+1/(4x7)+1/(7x10)+1/(10x13)=1/3x(1-1/4)+1/3x(1/4-1/7)+1/3x(1/7-1/10)+1/3x(1/10-1/13)=1/3x(1-1
3.95加1.2x5.2和2.3x4.8x0.5等于3.95加6.24加5.52等于15.71
1/17x4/9+5/17x1/9=1/17x4/9+1/17x5/9=1/17x(4/9+5/9)=1/17x1=1/17
48X0.69+3.1X4.8=48x0.69+48x0.31=48x(0.69+0.31)=48x1=48
=26x15.7+15.7x48=(26+48)x15.7=74x15.7=1161.8
33.2*4+33.4*8=33.2*4+66.8*4=（33.2+66.8）*4=100*4=400
=sumproduct(mod(column(o4:iv4)-14,3)=1)*o4:iv4)再问：�ʽ����再答：=sumproduct((mod(column(o4:iv4)-14,3)=1
11x22+0.22x3300+330x4.4=2*11*11+2*3*11*11+3*4*11*11=(2+6+12)*11^2=20*121=2420
9.52x4-3.52÷0.25=9.52x4-3.52×4=4×（9.52-3.52）=4×6=24
25．25*0．65*4/0．65＝（25.25*4）*（0.65/0.65）＝101*1＝101
(324又7分之1-810又6分之1+486.5)x4.2=(324+486-810+1/7-1/6+1/2)x4.2=（1/7-1/6+1/2）x4.2=1/7x4.2-1/6x4.2+1/2x4.
25.25x0.64x4/0.64=25.25x4=25x4+0.25x4=100+1=101
由120^6/(6^6×5^6×4^5)=120^6/(30^6×4^5)=120^6/(120^5×30)=120/30=4.
25x4+17x4100+68168
0.125x4.8x0.25=0.125×8×（0.25×2）×0.3=1×0.5×0.3=0.15
24x3/5+3/5=(24+1)x3/5=25x3/5=152/3x4/7x3/10=(2/3x3/10)x4/7=1/5x4/7=4/35
36.3X4.5+6.37X45=36.3X4.5+4.5X63.7=4.5X(36.3+63.7)=4.5X100=450