ldcf.net
当前位置:首页 >> 9.5 ÷(1.9x0.8)簡便計算 , >>

9.5 ÷(1.9x0.8)簡便計算 ,

0.8x1.9+0.8x0.6 =0.8x(1.9+0.6) =0.8x2.5 =2

(x-1.9)÷0.5=12.8 x-1.9=12.8×0.5 x-1.9=6.4 x=6.4+1.9 x=8.3

第一题 (450/16)*9=253.125 第二题 ( 24*12.5)/(12.5-2.5)=30或者24+(24*2.5)/(12.5-2.5)=10 望你采纳!谢谢!!!

(1-5分之1÷3分之1)X16分之15 = (1-5分之3)X16分之15 =2/5 × 16/15 =32/75 20分之9÷[2分之1X(5分之2+0.8)] = 20分之9÷[2分之1X5分之6] = 20分之9÷5分之3 = 20分之9 ×3分之5 =3/4

4分之1x0.8+2分之1除以4分之3-0.8 =4分之1x0.8+2分之1×3分之4-0.8 =0.2+3分之2-0.8 =3分之2-0.6 =15分之1 0.25除以(1-9分之5)+8分之3 =1/4÷4/9+3/8 =9/16+3/8 =15/16 (64x8分之3+76)除以12分之5 =(24+76)×12/5 =100×12/5 =240

①(3+x)×0.4=8 3+x=20 x=17 ②(x-7)÷3=8 x-7=24 x=31 ③x÷(1-1/9-25%)=2又1/2 x÷(1-1/9-1/4)=5/2 x÷23/36=5/2 x=115/72 ④8(x-2)=2(x+7) 8x-16=2x+14 6x=30 x=5 补充的第一题,题目不对,请核对一下

3.6x5.7+3.67 =20.52+3.67 =24.19 2.57x99+2.57 =2.57x(99+1) =2.57x100 =257 5.3-0.6x0.24 =5.3-0.144 =5.156 3.9x4.5+4.5x6.1 =(3.9+6.1)x4.5 =10x4.5 =45 1.25x27x0.8 =1.25x0.8x27 =1x27 =27 2.5x(40+4+0.4) =2.5x4x11.1 =10x11.1 =111

1、x﹣1/4x=1/2 3/4x=1/2 x=1/2÷3/4 x=2/3 2、x﹣1/4=1/2 x=1/2﹢1/4 x=3/4 3、x﹣0.8x=22 0.2x=22 x=22÷0.2 x=110 x﹢3/4=6 x=6﹢3/4 x=6.75(6又3/4) 4、6x﹢3/2x=9 7.5x=9 x=9÷7.5 (7.5就是7又二分之一) x=1.2 (1.2就是1...

5/1x6/1+6/1x7/1+7/1x8/1+8/1x9/1+9/1x10/1 =5X6+6X7+7X8+8X9+9X10 =6X12+7X8+9X18 =6X(12+27)+7X8 =6X39+7X8 =234+56 =290

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com