简便计算题3.2X1.25和1.2X25+0.8X2.5简便计算4.8X0.252.33X0.5X41.5X1051.2X2.5+0.8X2.5

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 04:41:29
简便计算题3.2X1.25和1.2X25+0.8X2.5简便计算4.8X0.252.33X0.5X41.5X1051.2X2.5+0.8X2.5

简便计算题3.2X1.25和1.2X25+0.8X2.5简便计算4.8X0.252.33X0.5X41.5X1051.2X2.5+0.8X2.5
简便计算题
3.2X1.25和1.2X25+0.8X2.5
简便计算
4.8X0.25
2.33X0.5X4
1.5X105
1.2X2.5+0.8X2.5

简便计算题3.2X1.25和1.2X25+0.8X2.5简便计算4.8X0.252.33X0.5X41.5X1051.2X2.5+0.8X2.5
3.2X1.25
=1.25x8x0.4
=10x0.4
=4
2.33X0.5X4
=2.33x2
=4.66
1.5X105
=1.5x100+1.5x5
=150+7.5
=157.5
1.2X2.5+0.8X2.5
=2.5x(1.2+0.8)
=2.5x2
=5

3.2X1.25=4 1.2X25+0.8X2.5=32

sorry,i can't, you should do it by yourself.