(7/11+8/15)-(7/11-7/15)怎么算
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(7/11+8/15)-(7/11-7/15)怎么算(7/11+8/15)-(7/11-7/15)怎么算(7/11+8/15)-(7/11-7/15)怎么算(7/11+8/15)-(7/11-7/15
(7/11+8/15)-(7/11-7/15)怎么算
(7/11+8/15)-(7/11-7/15)怎么算
(7/11+8/15)-(7/11-7/15)怎么算
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1
这是简单方法,当然你也可以用通分的办法来做,不过很烦就是了
不是吧
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=1/15
=7/11+8/15-7/11+7/15
=8/15+7/15
=1
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=0+1
=1
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1
=7/11+8/15-7/11+7/15
=8/15+7/15
=1
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1
(7/11+8/15)-(7/11-7/15)怎么算
7,8,11,7,15,( ),19,5
7,8,11,7,15,(),19,5 规律
能简算的要简算 (3)11/12×5/7+11/12×2/7 (4)7/8×15+7/8(3)11/12×5/7+11/12×2/7(4)7/8×15+7/8
7+11+15+.+999
11分之7-(15分之11-11分之4)
(7/8+7/9+7/10+7/11)*(7/9+7/10+7/11+7/12)-(7/8+7/9+7/10+7/11+7/12)*(7/9+7/10+7/11)求帮助,谢谢!
数列题:3,8,7,4,11,( ),15
11/15+7/8-(11/15-1/8)简便计算
7×一又3/11-二又4/7×15-(-1.7)×8/11+3/7×(-15)
数字找规律 6,( ),7,( ),( ),7,( ),8,( ),( ),11,( ),12,( ),( ),15
15分之7×()=()×8分之11等于7×()=1快速.
找规律15,6,13,7,11,8,9,9,7,10,( ),( )急
7/11-4/7+15/11-3/7
(7/11+8/15)-(7/11-7/15)脱式计算(7/11+8/15)-(7/11-7/15)写过程,脱式计算,能简算的要简算7/30+3/8+23/30-4/8
【11分之7-(15分之8-11分之4)】÷45分之14 简便计算
6道分数脱式计算,能简算的要简算,(1)8/9×3/8+7/9(2)8/15-7/15×5/7(3)11/12×5/7+11/12×2/7(4)7/8×15+7/8(5)(5+5/8)×3/5(6)12×(2/11-1/12)×11
8/11+7/15-8/15= 11分之8加15分之7减15分之8等于多少?