简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4 简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4

简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4 简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4
简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4
简便计算:1.25X48
3.18X3.6+3.18X3.6
7.2乘10.1
解方程:0.7(3+×)=2.8
5.2x-x=29.4

简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4 简便计算:1.25X48 3.18X3.6+3.18X3.6 7.2乘10.1 解方程:0.7(3+×)=2.8 5.2x-x=29.4
1.25X48
原式=1.25×8×6=10×6=60
3.18X3.6+3.18X3.6
原式=3.18×3.6×2=22.896
7.2乘10.1
原式=7.2×（10+0.1）
=7.2×10+7.2×0.1
=72+0.72
=72.72
解方程:0.7(3+×)=2.8
可化为3+x=4
x=1
5.2x-x=29.4
可化为4.2x=29.4
x=7

1.25X48
=1.25*(40+8)
=1.25*40+1.25*8
=50+10
=60;
3.18X3.6+3.18X3.6
=3.18*3.6*2
=3.18*7.2
=3.18*(7+0.2)
=3.18*7+3.18*0.2
=22.26+0.636
=22.896.
7.2*10.1...

全部展开

1.25X48
=1.25*(40+8)
=1.25*40+1.25*8
=50+10
=60;
3.18X3.6+3.18X3.6
=3.18*3.6*2
=3.18*7.2
=3.18*(7+0.2)
=3.18*7+3.18*0.2
=22.26+0.636
=22.896.
7.2*10.1
=7.2*(10+0.1)
=7.2*10+7.2*0.1
=72+0.72
=72.72

解方程:0.7(3+×)=2.8
3+x=2.8/0.7
3+x=4
x=4-3
x=1
5.2x-x=29.4
x(5.2-1)=29.4
x*4.2=29.4
x=29.4/4.2
x=7.

收起

1.25X48
=1.25*(40+8)
=1.25*40+1.25*8
=50+10
=60;
3.18X3.6+3.18X3.6
=3.18*3.6*2
=3.18*7.2
=3.18*(7+0.2)
=3.18*7+3.18*0.2
=22.26+0.636
=22.896.
7.2*10.1...

全部展开

1.25X48
=1.25*(40+8)
=1.25*40+1.25*8
=50+10
=60;
3.18X3.6+3.18X3.6
=3.18*3.6*2
=3.18*7.2
=3.18*(7+0.2)
=3.18*7+3.18*0.2
=22.26+0.636
=22.896.
7.2*10.1
=7.2*(10+0.1)
=7.2*10+7.2*0.1
=72+0.72
=72.72

解方程:0.7(3+×)=2.8
3+x=2.8/0.7
3+x=4
x=4-3
x=1
5.2x-x=29.4
x(5.2-1)=29.4
x*4.2=29.4
x=29.4/4.2
x=7.

收起

高三这么简单

1 1.25X48
原式=1.25×8×6=10×6=60
3.18X3.6+3.18X3.6
原式=3.18×3.6×2=22.896
7.2乘10.1
原式=7.2×（10+0.1）
=7.2×10+7.2×0.1
=72+0.72
=72.72
解方程:0.7(3+×)=2.8
可化为3+x=4

全部展开

1 1.25X48
原式=1.25×8×6=10×6=60
3.18X3.6+3.18X3.6
原式=3.18×3.6×2=22.896
7.2乘10.1
原式=7.2×（10+0.1）
=7.2×10+7.2×0.1
=72+0.72
=72.72
解方程:0.7(3+×)=2.8
可化为3+x=4
x=1
5.2x-x=29.4
可化为4.2x=29.4
x=7
2 1.25X48
=1.25*(40+8)
=1.25*40+1.25*8
=50+10
=60;
3.18X3.6+3.18X3.6
=3.18*3.6*2
=3.18*7.2
=3.18*(7+0.2)
=3.18*7+3.18*0.2
=22.26+0.636
=22.896.
7.2*10.1
=7.2*(10+0.1)
=7.2*10+7.2*0.1
=72+0.72
=72.72

解方程:0.7(3+×)=2.8
3+x=2.8/0.7
3+x=4
x=4-3
x=1
5.2x-x=29.4
x(5.2-1)=29.4
x*4.2=29.4
x=29.4/4.2
x=7.

收起