ldcf.net
当前位置:首页 >> 4.8x0.2+48x0.48简便方法? >>

4.8x0.2+48x0.48简便方法?

(10-0.2)x0.48用简便方法算 =10x0.48-0.2x0.48 =4.8-0.096 =4.704

解:4.82x0.59+4.1x0.482 =4.82x0.59+0.41x10x0.482 =4.82x0.59+0.41x4.82 =4.82x(0.59+0.41) =4.82x1 =4.82

g

0.32+0.48×8.5=0.16×2+0.16×3×8.5=0.16×(2+3×8.5)=0.16×27.5=4.4

设0.48+0.82=a ∴原式可化为 (2+a)(a+0.56)-(2+a+0.56)a =a²+2a+0.56a+1.12-a²-2a-0.56a =1.12

是不是给错小数点了 这题简算不了 1.2×0.24+0.48×24 =0.012×24+0.48×24 =0.492×24 =11.808

=0.48×(2.3+8.7-1) =0.48×10 =4.8

0.6ⅹ+0.9×0.2=0.48 解:0.6x+0.18=0.48 0.6x=0.48-0.18 0.6x=0.3 x=0.5

4.8*0.87+2.3*0.48-0.12*4 =0.48*8.7+2.3*0.48-0.12*4 =0.48*(8.7+2.3)-0.48 =0.48*(8.7+2.3-1) =0.48*10 =4.8

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