(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/24 15:16:22
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
=(4.12+1.3)×(4.12+6.51)-(4.12+7.91)×4.12
=4.12×4.12+1.3×4.12+4.12×6.51+1.3×6.51-4.12×4.12-7.91×4.12
=1.3×4.12+1.3×6.51-(7.91-6.51)×4.12
=1.3×4.12+1.3×6.51-1.4×4.12
=1.3×6.51-0.1×4.12
=8.463-0.412
=8.051
=(4.12+1.3)×(4.12+6.51)-(4.12+7.91)×4.12
=4.12×4.12+1.3×4.12+4.12×6.51+1.3×6.51-4.12×4.12-7.91×4.12
=1.3×4.12+1.3×6.51-(7.91-6.51)×4.12
=1.3×4.12+1.3×6.51-1.4×4.12
=1.3×6.51-0.1×4.12
=8.463-0.412
=8.051
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72
解方程7x-3.4x=0.72; 3(x+2.1)=10.5;
7x-3.4x=0.72这个方程怎么解
7x-3.4x=0.72解方程
7x减3.4x等于0.72列方程
0.72千克=( )克
简便计算4.52-(3.52+0.72)
用简便方法计算:(﹣5分之3)×(﹣12)+0.72×9分之5+(﹣12)×(﹣5分之2)+9分之4×0.72
0.28*0.72+0.72*0.72简便计算
3.4
9.76*0.72-0.72*0.72+0.72怎么简便计算啊
解方程.4.5×6+4x=41 7x-3.4x=0.72 2x+1.5x=42 &nb