2/3减3/7加括号里1/3加3/7括起来,用简便方法记算

2/3减3/7加括号里1/3加3/7括起来,用简便方法记算
2/3减3/7加括号里1/3加3/7括起来,
=2/3-3/7+(1/3+3/7)
=2/3+1/3+(3/7-3/7)
=1+0
=1

3/7加括号2/3加1/21四括号,

3/7+(2/3+1/21)
=9/21+14/21+1/21
=24/21
=8/7
=1又1/7。

括号3/7×1/41+1/41×2/9括起来乘以63用简便方法算

(3/7×1/41+1/41×2/9)x63
=1/41x(3/7+2/9)x63
=1/41x(3/7x63+2/9x63)
=1/41x(27+14)
=1/41x41
=1

1/3÷括号里2/3-2/5括起来乘3/5怎么简便

解: 1/3÷(2/3-2/5)*3/5
=1/3÷(10/15-6/15)*3/5
=1/3÷ 4/15*3/5
=1/3 * 15/4 *3/5
=5/4*3/5
=3/4

1/42除以括号1/6减3/14加2/3减2/7括起来

1/14

  • 解析:

1/42÷(1/6-3/14+2/3-2/7)

=1/42÷(5/6-1/2)

=1/42÷(1/3)

=3/42

=1/14

括号3/5加1/6减2/15括号乘30简便方法计算

(3/5+1/6-2/15)×30
=3/5×30+1/6×30-2/15×30
=18+5-4
=19

5/9加括号里3/4-1/3,简便方法怎么算?

5/9+(3/4-1/3)
=5/9+(27/36-12/36)
=20/36+15/36
=35/36

2/3加括号2/3减1/2括号乘以6/7简便计算

2/3加括号2/3减1/2括号乘以6/7简便计算
2/3加括号2/3减1/2括号乘以6/7
=2/3+(2/3-1/2)*6/7
=2/3+1/6*6/7
=2/3+1/7
=17/21

2/7×3/4 75%×3/7加×79÷括号1÷4/3简便运算

=7分之2×0.75+7分之3×0.75+7分之9÷3分之4
=(7分之2+7分之3)×0.75+7分之9×0.75
=(7分之5+7分之9)×0.75
=2×0.75
=1.5

3/7-括号1/2-3/7括起来加1/2

3/7-(1/2-3/7)+1/2
=3/7-1/2+3/7+1/2
=(3/7+3/7)+(1/2-1/2)
=6/7+0
=6/7

点击查看隐藏内容

本文内容整理自网络, 文中所有观点看法不代表问咩的立场