20/7×括号里7/15+3/20括起来减15/14
20/7×括号里7/15+3/20括起来减15/14
-28/15-[(-47/20)*(-1)^8-(-2/5)/(3/7)] =-28/15-[-47/20+14/15] =-28/15+47/20-14/15 =-42/15+47/20 =-7/60
7/15×括号5/7 5/14括起来
7/15x(5/7+5/14)
=7/15x5/7+7/15x5/14
=1/3+1/6
=1/2
3×括号里2/15+5/12括起来减2/32
3×(2/15+5/12)-2/32
=2/5-5/4-1/16
=32/80-100/80-5/80
=-73/80。
[6分之5-括号里7/10-15分之四括起来减算
6分之5-括号里7/10-15分之四括起来简算
5/6-(7/10-4/15)
=5/6-7/10+4/15
=25/30-21/30+8/30
=2/5
括号里13-3/5÷(7/15)
13-3/5÷(7/15)
=13-3/5×15/7
=13-9/7
=91/7-9/7
=82/7
2/7×括号里7/4-7/6括起来
2/7×括号里7/4-7/6括起来
解:
2/7×(7/4-7/6)
=2/7×7/4-2/7×7/6
=1/2-1/3
=1/6
7/16减(3/1加7/13)=? 15/14减5/2加15/1减5/3加6/5=? (4/3减7/1)加(4/1加7/1)=? 20/1减30/1加40/1=?
7/16减(3/1加7/13)=7/16-32/13=(7*13-32*16)/208=-421/208
15/14减5/2加15/1减5/3加6/5=-20/14+15-5/3+6/5
=190/14-5/3+6/5=500/42+6/5=2248/210=1124/105
(4/3减7/1)加(4/1加7/1)=-17/3+11=16/3
20/1减30/1加40/1=20+30+40=90
7/8加2/8减括号里的.7/8加2/5括起来
7/8 + 2/5 - (7/8 + 2/5)
=(7/8 - 7/8)+(2/5 - 2/5)
=0 + 0
=0
希望我的回答对您有帮助,满意请采纳,谢谢。
7/3乘括号8/5除15/4
14
-
解析:
7/3×8/5×15/4
=56/15×15/4
=56/4
=14
括号里9/10×7/8×13/6括号除以12/3×7/16×18/15
括号9/10×7/8×13/6括号除以括号12/3×7/16×18/15括号
(9/10×7/8×13/6)÷(12/3×7/16×18/15)
=(273/160)÷(21/10)
=(273/160)×(10/21)
=13/16