1楼:匿名用户
(2/3+4/15×5/8)÷2/3
=(2/3+4/15×5/8)×3/2
=2/3×3/2+4/15×5/8×3/2=1+1/2
=1又1/2
(5/7÷8+1/8)×16=5/7×1/8×16+1/8×16=10/7+2
=3又3/7
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2楼:匿名用户
(2/3+4/15×5/8)÷2/3
=(2/3+1/6)×3/2
=5/4
(5/7÷8+1/8)×16
=12/56×16
=24/7
3楼:匿名用户
(2/3+4/15×5/8)÷2/3
=(2/3+4*5/15/8)*3/2
=2/3*3/2+4*5*3/15/8/2=1+1/4
=5/4=1又1/4
(5/7÷8+1/8)×16
=(5/7+1)*16/8
=10/7+2
=3又3/7
【简算】 (3/4-2/3)÷1/5 4/5×7/8+7/8÷5 (1-8/15×3/4)÷3/5 (3/8+2/17)×8+1/17
4楼:新野旁观者
(3/4-2/3)÷1/5
=1/12ch35
=5/12
4/5×
7/8+7/8÷5
=(4/5+1/50×7/8
=1×7/8
=7/8
(1-8/15×3/4)÷3/5
=(1-2/5)×5/3
=3/5×5/3
=1(3/8+2/17)×8+1/17
=3/8×8+(16/17+1/17)
=3+1=4
34/15-(4/15+2/5) 2-3/8÷7/16-1/7 5/12÷8+1/8×7/12 2/3×8/5+1/3÷5/8 (1/4-1/20)×40
5楼:匿名用户
第一个题要是能写清楚点就好了 感觉有点乱 不过按顺序一一算能算出来
3/4×【(7/15-1/5)÷2/3】=3/4×3/2×(7/15-1/5)
=3/4×3/2×(7/15-3/15)
=3/4×3/2×4/15
= 3/10
3/5×(1/7+8/21÷2/3)=3/5×(1/7+4/7)=3/5×5/7=3/7
(2/3-3/4×1/3)÷5/4=(2/3-1/4)×4/5=2/3×4/5-1/4×4/5
=8/15-3/15
=5/15
=1/3
1/2-8/9÷5/6×3/16 =1/2-1/5=3/10
(5/12+1/9-3/8)×72 = 5/12×72 +1/9×72 -3/8 ×72
=30 +8-27
=5【1-(75%+1/12)】×3/2=【1-(3/4+1/12)】×3/2
=【1-5/6】×3/2
=1/6×3/2
=1/4
6楼:百度用户
()*3/2=4/3,5/2÷()=5/4
脱式计算,5/8×7+9÷8/5,15÷(2/3-1/5),6/5×2/15+2/15÷5/4?
7楼:妙酒
5/8×7+9÷
8/5,
=5/8x7+9x5/8
=(7+9)x5/8
=16x5/8
=1015÷(2/3-1/5)
=15÷(10/15-3/15)
=15÷7/15
=225/7
6/5×2/15+2/15÷5/4
=2/15x6/5+2/15x4/5
=2/15x(6/5+4/5)
=2/15x2
=4/15
要简便算法,过程 1:8/9×(9+3/4)-2/3 2:7/8÷2/3+7/8×1/2 3:4-2/5÷8/15-1/4
8楼:
1:8/9×(
9+3/4)-2/3=8/9×9+8/9×3/4-2/3=8+2/3-2/3=8 2:7/8÷2/3+7/8×1/2=7/8×3/2+7/8×1/2=7/8×(3/2+1/2)=7/8×2=7/4 3:4-2/5÷8/15-1/4=4-2/5×15/8-1/4=4-3/4-1/4=4-(3/4+1/4)=4-1=3 4:
7/8+2/3÷4/5+1/6=7/8+2/3×5/4+1/6=7/8+5/6+1/6=7/8+1=15/8 5: 6-5/12×9/10-13/8 =6-3/8-13/8=6-(3/8+13/8)=6-2=4 6: 4/5+5/8÷1/4+1/2=4/5+5/8×4+1/2=4/5+5/2+1/2=4/5+3=19/5 7:
2-8/9×3/4-1/3=2-2/3-1/3=2-(2/3+1/3)=2-1=1 10: 4/9+2/7+5/18÷1/2=4/9+2/7+5/18×2=4/9+2/7+5/9=4/9+5/9+2/7=1+2/7=9/7 11:4-8/15÷2/3-1/5=4-8/15×3/2-1/5=4-4/5-1/5=4-(4/5+1/5)=4-1=3 口算的,你回去检验下吧
9楼:匿名用户
8/9×(9+3/4)-2/32=8/9*9+8/9*3/4-1/16=8+(2/3-1/16)=8又29/48
10楼:匿名用户
7/8+2/3*5/4+1/6=7/8+5/6+1/6=15/8
11楼:含黙兮攸语
我x,这个还要简便方法。我砸觉得直接算就是最简便的、。、、
用简便算法:2/3一5/6×3/10+3/2,7/4÷(2/3+1/2)x4/5,8/15÷9+1
12楼:兖矿兴隆矿
2/3一5/6×3/10+3/2
=2/3-1/4+3/2
=(8-3+18)/12
=23/12
7/4÷(2/3+1/2)x4/5
=(7/4*4/5)/(7/6)
=7/5*6/7
=1.2
8/15÷9+1/9x7/15
=1/15*(8/9+7/9)
=1/15*15/9
=1/9
[4一(3/4一3/8)]×4/29
=[4-3/8]*4/29
=29/8*4/29
=1/2
9/3×2/3+4/5÷8/7简便计算。
13楼:亍城疗钒
4/7÷8/3+3/7?3/8 =4/7x3/8+3/7x3/8 =(4/7+3/7)x3/8 =1x3/8 =3/8 5/8÷7/9+3/8÷7/9 =(5/8+3/8)÷7/9 =1÷7/9 =9/7 5/6?7/13+6/13÷6/5+5/6 =5/6x7/13+7/13x5/6+5/6 =5/6x(7/13+6/13+1) =5/6x2 =5/3
4/5×7/8+7/8÷5(简便计算) (1—8/15×3/4)÷3/5(简便计算) 1—5/8÷
14楼:温柔_黏喻勊
计算器1-5/8/25/28-3/10 = 0.69910714285714
计算器4/5*7/8+7/8/5 = 0.875
简便运算:1/5*8÷4/5 3/5+1/2*4/5 5/6÷2/3÷5/6 1-7/9÷7/8
15楼:匿名用户
1/5*8÷4/5
=(8/5)×(5/4)
=23/5+1/2*4/5
=3/5+2/5
=15/6÷2/3÷5/6
=(5/6)×(3/2)×(6/5)
=3/2
1-7/9÷7/8
=1-(7/9)×(8/7)
=1-8/9
=1/9
(简便计算1—,【简算】 (3/4-2/3)÷1/5 4/5×7/8+7/8÷5 (1-8/15×3/4)÷3/5 (3/8+2/17)×8+1/17
1楼 温柔 黏喻勊 计算器1 5 8 25 28 3 10 0 69910714285714 计算器4 5 7 8 7 8 5 0 875 简算 3 4 2 3 1 5 4 5 7 8 7 8 5 1 8 15 3 4 3 5 3 8 2 17 8 1 17 2楼 新野旁观者 3 4 2 3 1 5...
8)8 9简便计算,(2/9+7/8)×8×9简便计算。
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