六年级数学简便计算和解方程
答案:3 悬赏:0 手机版
解决时间 2021-03-24 09:37
- 提问者网友:情歌越听越心酸
- 2021-03-23 12:12
六年级数学简便计算和解方程
最佳答案
- 五星知识达人网友:春色三分
- 2021-03-23 12:25
23/4x40%+0.4x4.25
=5.75x0.4+0.4x4.25
=0.4x(5.75+4.25)
=0.4x10
=4
2*(x-0.7)=4.8
x-0.7=2.4
x=3.1
1/8*(x+0.5)=75%
x+0.5=600%
x+0.5=6
x=5.5
19-12%x=7
12%x=12
x=100
5/12x4/7x48x28
=(5/12x48) x (4/7x28)
=20x16
=320
102x12/25
=(100+2)x12/25
=100x12/25+2x12/25
=48+24/25
= 48.96
36x3/4+3/4x63+3/4
=3/4x(36+63+1)
=3/4x100
=75
20-35x(2/5-1/7)
=20-(35x2/5-35x1/7)
=20-14+5
=11
有帮助请采纳,有问题请新开,谢谢。我们打字也很辛苦。追问谢谢啦·等会儿就采纳~追答不用谢。。追问这是最后一个了~
7/10÷(1-75%x40%)追答7/10÷(1-75%x40%)
=7/10÷(1-0.3)
=0.7÷0.7
=1
=5.75x0.4+0.4x4.25
=0.4x(5.75+4.25)
=0.4x10
=4
2*(x-0.7)=4.8
x-0.7=2.4
x=3.1
1/8*(x+0.5)=75%
x+0.5=600%
x+0.5=6
x=5.5
19-12%x=7
12%x=12
x=100
5/12x4/7x48x28
=(5/12x48) x (4/7x28)
=20x16
=320
102x12/25
=(100+2)x12/25
=100x12/25+2x12/25
=48+24/25
= 48.96
36x3/4+3/4x63+3/4
=3/4x(36+63+1)
=3/4x100
=75
20-35x(2/5-1/7)
=20-(35x2/5-35x1/7)
=20-14+5
=11
有帮助请采纳,有问题请新开,谢谢。我们打字也很辛苦。追问谢谢啦·等会儿就采纳~追答不用谢。。追问这是最后一个了~
7/10÷(1-75%x40%)追答7/10÷(1-75%x40%)
=7/10÷(1-0.3)
=0.7÷0.7
=1
全部回答
- 1楼网友:一袍清酒付
- 2021-03-23 13:41
1.23/4*2/5+2/5*17/4
=2/5(23/4+17/4)
=2/5*10
=4
2.2x-1.4=4.8
2x=6.2
x=3.1
3.x/8+1/8*1/2=3/4
x/8=3/4-1/16
x/8=11/16
x=11/2
=2/5(23/4+17/4)
=2/5*10
=4
2.2x-1.4=4.8
2x=6.2
x=3.1
3.x/8+1/8*1/2=3/4
x/8=3/4-1/16
x/8=11/16
x=11/2
- 2楼网友:狂恋
- 2021-03-23 12:36
原式=5.75×0.4+0.4×4.25
=0.4×(5.75+4.25)
=0.4×10
=4
2x-1.4=4.8
2x=6.2
x=3.1
x+0.5=6
x=5.5
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