6.5乘0.56加2.5乘13
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/25 01:25:09
38.4✘13+30.8✘2✘13再答:13✘(38.4+30.8✘2)再答:8✘4✘25Ϩ
0.12*2.5+0.25*8.8=1.2*0.25+8.8*0.25=0.25*(1.2+8.8)=0.25*10=2.5
5.6×8.8+0.56×12=5.6×8.8+5.6×1.2=5.6×(8.8+1.2)=5.6×10=56
=2.37*82+2.37+13+2.37*5=2.37*(82+13+5)=2.37*100=237
设那数为X0.27*5.6+5.6X+5.6*0.25=0.78*0.565.6*(0.27+X+0.25)=0.078*5.60.52+X=0.078X=-0.442
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
寒樱暖暖为你7.8×2.5+78×0.75=7.8×2.5+7.8×7.5=7.8×(2.5+7.5)=7.8×10=78(或在客户端右上角评价点【满意】)是我前进的动力!如有不明白,直到完成弄懂此题
得数是13
两种方法1.0.87*2.5+0.87*10*7.5=0.87*(2.5+10*7.5)=0.87*77.52.0.87*2.5+8.7*3*2.5=2.5*(0.87+8.7*3)=2.5*(0.8
13.5*9.9+6.5*10.1=13.5*(10-0.1)+6.5*(10+0.1)=(13.5+6.5)*10+0.1(6.5-13.5)=200-0.7=199.3
39*13+35*39+46*61=39*48+46*61=39*48+48*61-61*2=4800-122=4678968*49/98=(968/2)*(49*2)/98=968/2=484
再答:过程非常清楚。请给悬赏。谢谢。
4.9*0.45+0.49*4.2+0.049*13=4.9*0.45+4.9*0.42+4.9*0.13=4.9*(0.45+0.42+0.13)=4.9x1=4.9
0.56*202=0.56*200+0.56*2=112+1.12=113.124.8*0.125=0.6*8*0.125=0.6*1=0.64.6*1.9+5.4*1.9=1.9*(4.6+5.4)
=9.6+9.9x99=4.65x32+2.5x46.5+0.465x430=9.6+(9.9x100)-9.9=46.5x3.2+46.5x2.5+46.5x4.3=9.6+990-9.9=46.5
2.5*13+0.9=32.5+0.9=33.4
46.1×0.56+5.38×5.6+1×0.056=46.1×0.56+53.8×0.56+0.1×0.56=0.56×(46.1+53.8+0.1)=0.56×100=56