nynw.net
当前位置:首页 >> 1+8%8+8÷8X3= >>

1+8%8+8÷8X3=

(1)25x-8=2, 25x-8+8=2+8, 25x=10, 25x×52=10×52, x=25;(2)(60+15)÷x=34, 75÷x=34, 75÷x×x=34×x, 34x×43=75×43, x=100; (3)(1+12)x-34x=0.8, 34x=0.8, 34x×43=45×43, x=1615;(4)1.8x=34:16, 34x=1.8×16, 34x×43=95...

1/4×3/8+5/8÷4怎样简便计算 =1/4x3/8+5/8x1/4 =1/4x(3/8+5/8) =1/4x1 =1/4

7/9x9=7 20/9÷4/3= 5/3 20x8/5= 32 4/5x15/8x1/6=1/4 1÷1/8÷8/15=15

8x+2×1.5=21 8x+3=21 8x=21-3 8x=18 x=2.5 (15+x-8.4)÷8=1.2 15+x-8.4=1.2×8 x+7.6=9.6 x=9.6-7.6 x=2

(1)(a+2b)(3a-7b),=3a2-7ab+6ab-14b2,=3a2-ab-14b2;(2)(16x2y3z+8x3y2z)÷8x2y2,=16x2y3z÷8x2y2+8x3y2z÷8x2y2,=2yz+xz.

5/8x3/4+1/4x5/8+5/8 =(3/4+1/4+1)×5/8 =2×5/8 =5/4 4分之5

1/3x3/8=1/8 1/8➗1/2=1/8x2=1/4

[1-(1/4+3/8)]÷(1/2) =( 1+ 1/8) ÷(1/2) =(9/8)x2 =9/4 =4分之9

×/60-×/70=1 解:×/60×420-×/70×420=1×420→两边同乘420 70×-60×=420→不能约数,这一步关键。 10×=420 ×=420÷10 ×=42 最后验证是否正确: 42÷6-42÷7 =7-6 =1

2.7÷8+3.3×1/8这道题怎么简算 =1/8×(2.7+3.3) =1/8×6 =6/8 =3/4

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