xqzz.net
当前位置:首页 >> 3.14x5x5x2 2x3.14x5x15怎样简便计算 >>

3.14x5x5x2 2x3.14x5x15怎样简便计算

3.14x5x5x2 2x3.14x5x15怎样简便计算 3.14x5x5x2 2x3.14x5x15 =3.14*(5*5*2+2*5*15) =3.14*(50+150) =3.14*200 =628

3.14x2.25x5 =7.065x5 =35.325

3.14x5.2=3.14x5+3.14x0.2 =15.7+0.628 =16.328 利用乘法分配律。

3.14×5×10+3.14×25/4×2 =3.14×25(2+1/2) =3.14×25×5/2 =196.25。

3.14x5x5+2x3.14x2.5x2.5+5x2x2 =3.14x(5x5+2x2.5x2.5)+20 =3.14x(25+12.5)+20 =3.14x37.5+20 =117.75+20 =137.75 答题不易,望采纳~~~

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