www.5129.net > 一点八除以括号12点四八减零点七乘以六点四

一点八除以括号12点四八减零点七乘以六点四

〈(1.8-0.6)/口+2.5〉x0.4 = 3.4〈1.2/口+2.5〉x0.4 = 3.4 0.48/口+1 = 3.40.48/口 = 2.4口 = 0.48/2.4 = 0.2

0.8(12-x)=6.49.6-0.8x=6.4 0.8x=9.6-6.4 0.8x=3.2 x=3.2÷0.8 x=4满意请点击右下角的采纳答案,谢谢

4.66*0.18+4.6*0.8-4.6=4.66*0.18-4.6(1-0.8)=4.66*0.18-0.92=4.66(0.2-0.02)-0.92=0.932-0.0932-0.92=0.012-0.0932=-0.0812

(7.2*2.4-9.48)÷0.25=(17.28-9.48)÷0.25=7.8*4=31.2

可以不用简算啊直接算蛮简单的8.4÷0.7-8.5*0.6=84÷7-5.1=12-5.1=6.9

原式=4.7-1.84-0.16-2.7=(4.7-2.7)-(1.84+0.16)=2-2=0

5.28-0.44-(2.56-1.72) =4.84- 0.48 =4.36 有括号先算括号. 再算外面的

3.14*6.8+31.4*0.32=3.14*6.8+3.14*3.2=3.14*(6.8+3.2)=3.14*10=31.4

1÷2*3÷(2÷6)*(5÷3÷2)*7÷1.4=1/2*3÷1/3*5/6*7÷1.4=1/2*3*3*5/6*5=1/2*25/6=25/12=2又1/12

化成分数,再把括号展开.就可以都约分掉,最后=10

相关搜索:

网站地图

All rights reserved Powered by www.5129.net

copyright ©right 2010-2021。
www.5129.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com