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
=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
【(8/7+6/1)÷8/5-4/3】×11/6简便方法计算(3/2+5/1)÷15/7×11/6简便方法计算
3楼:匿名用户
【(8/7+6/1)÷8/5-4/3】×11/6=[(8分之7×5分之8+6分之1 ×5分之8)-4分之3]×11分之6
=(3分之5-4分之3)×11分之6
=12分之11×11分之6
=2分之1
(3/2+5/1)÷15/7×11/6
=(3分之2×7分之15+5分之1 ×7分之15)×11分之6=7分之13×11分之6
=77分之78
4楼:匿名用户
(20-19)+(18-17)+(16-15)+(14-13)+(12-11)+(10-9)+(8-7)+(6-5)+(4 -3)+(2-1)= 10
4/7÷(4/3)×5/8+3/7×3/8等于几分之几用简便算法算
5楼:匿名用户
4/7÷(4/3)×5/8+3/7×3/8=4/7×3/4×5/8+3/7×3/8
=3/7×5/8+3/7×3/8
=3/7×(5/8+3/8)
=3/7×1
=3/7
4/7÷[2/3×(1-5/8)]的简便方法?
6楼:妙酒
脱式计算
4/7÷[2/3×(1-5/8)]
=4/7÷(2/3×3/8)
=4/7÷1/4
=16/7
简便计算:(2/3+4/15×5/8)÷2/3 (5/7÷8+1/8)×16
7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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8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
9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
计算下面各题,注意使用简便方法 (3/4-2/3)÷1/5 (3/8+7/12)×8+1/
10楼:匿名用户
(3/4-2/3)÷1/5
=(9/12-8/12)x5
=1/12x5
=5/12
(3/8-7/12)x8+1/17
=3/8x8-7/12x8+1/17
=3-14/3+1/17
=5/3+1/17
=88/51
4/5x7/8+7/8÷5
=4/5x7/8+7/8x1/5
=(4/5+1/5)x7/8
=1x7/8
=7/8
(1-8/15x3/4)÷3/5
=(1一2/5)x5/3
=3/5x5/3=1
3/10×【7/8÷(3/5-1/4)】用简便方法
11楼:匿名用户
=3/10x[7/8÷(12/20-5/20)=3/10x[7/8÷7/20]
=3/10x[7/8x20/7]
=3/10x5/2
=3/4
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
12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
13楼:百度用户
()*3/2=4/3,5/2÷()=5/4
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