mtlb.net
当前位置:首页 >> 3.14x36 >>

3.14x36

竖式 3. 1 4 x 3 6 ______________ 1 8 8 4 9 4 2 ———————— 1 1 3. 0 4

3.14x36x1/4=3.14x9=28.26

利用乘法分配律简便计算 31.4x2.2+3.14x36+314x0.42 =3.14x22+3.14x36+3.14x42 =3.14x(22+36+42) =3.14x100 =314

-3.14x35.2+6.28x(-23.3)-1.57x36.4 =-3.14x35.2+3.14x(-46.6)-3.14x18.2 =-3.14x(35.2+46.6+18.2) =-3.14x100 =-314

720/(2x3.14x0.36)=318.3≈318(圈)

提取公因数3.14,则原式变为 3.14X[-35.2+2X(-23.3)-0.5X36.4] =3.14X[-35.2-46.6-18.2] =3.14X(-100) =-314

花坛半径:12÷2=6(米)小路面积:3.14x7x7-3.14x6x6=3.14x49-3.14x36=3.14x(49-36)=3.14x13=40.82(平方米) wdxf444... 推荐于:2017-10-02 4 7 ...

-3.14x35.2+6.28x(-23.3)-1.57x36.4 =-3.14x35.2+3.14x(-46.6)-3.14x18.2 =-3.14x(35.2+46.6+18.2) =-3.14x100 =-314

解:设高变为hcm,可得: 20x20x3.14h=10x10x3.14x36 化解得: 4h=36 解得: h=9 答:高变为9cm.

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