1楼:小百合
脱式计算,能简便要简便。
3/5×1/5÷3/5
=3/5÷3/5×1/5
=1/5
2/7-5/8×2/7
=(1-5/8)×2/7
=3/8×2/7
=3/28
1/4÷2/3+2/3÷4
=3/2÷4+2/3÷4
=(3/2+2/3)÷4
=13/6÷4
=13/24
1/3÷1/5+4/5
=5/3+4/5
=37/15
[1-(1/4+3/8)]÷1/4
=(1-5/8)×4
=3/8×4
=3/2
4/9×3/16+5/12
=1/12+5/12
=1/2
3/9-1/3×3/9
=(1-1/3)×1/3
=2/9
解方程1/2x÷1/4=8
1/2x=2
x=41/4x+2/3=3
1/4x=3-2/3
1/4x=7/3
x=28/3
1/3x+1/2x=5
5/6x=5
x=62/5x+1/3×6=4
2/5x=4-2
2/5x=2
x=52/7x=1/2×3/14
2/7x=3/28
x=3/8
4.5x+x=11/17
5.5x=11/17
x=2/17
x-1/12x=22
11/12x=22
x=24
脱式计算,能简便要简便。 3/5×1/5÷3/5 2/7-5/8×2/7 1/4÷2/3+2/3÷
2楼:匡吉月卷翼
脱式计算,能简便要简便。
3/5×1/5÷3/5
=3/5÷3/5×1/5
=1/5
2/7-5/8×2/7
=(1-5/8)×2/7
=3/8×2/7
=3/28
1/4÷2/3+2/3÷4
=3/2÷4+2/3÷4
=(3/2+2/3)÷4
=13/6÷4
=13/24
1/3÷1/5+4/5
=5/3+4/5
=37/15
[1-(1/4+3/8)]÷1/4
=(1-5/8)×4
=3/8×4
=3/2
4/9×3/16+5/12
=1/12+5/12
=1/2
3/9-1/3×3/9
=(1-1/3)×1/3
=2/9
解方程1/2x÷1/4=8
1/2x=2
x=41/4x+2/3=3
1/4x=3-2/3
1/4x=7/3
x=28/3
1/3x+1/2x=5
5/6x=5
x=62/5x+1/3×6=4
2/5x=4-2
2/5x=2
x=52/7x=1/2×3/14
2/7x=3/28
x=3/8
4.5x+x=11/17
5.5x=11/17
x=2/17
x-1/12x=22
11/12x=22
x=24
脱式计算。【过程】 1/3÷(2/3-2/5)×3/5 [1/2-(3/4-3/5)]÷7/10 8/9×[3/4-(7/16-1/4)]
3楼:匿名用户
解:依题意得算式,
3分之1÷(3分之2-5分之2)×5分之3=3分之1×5分之3÷(15分之10-15分之6)=5分之1÷15分之4
=5分之1×4分之15
=4分之3
[2分之1-(4分之3-5分之3)]÷10分之7=(2分之1-4分之3+5分之3)×7分之10=(20分之10-20分之15+20分之12)×7分之10=20分之7×7分之10
=2分之1
9分之8×[4分之3-(16分之7-4分之1)]=9分之8×(4分之3-16分之7+4分之1)=9分之8×(4分之3+4分之1-16分之7)=9分之8×(1-16分之7)
=9分之8×16分之9
=2分之1
即3分之1÷(3分之2-5分之2)×5分之3=4分之3[2分之1-(4分之3-5分之3)]÷10分之7=2分之19分之8×[4分之3-(16分之7-4分之1)]=2分之1
脱式计算【能简便的要简便】①2-[1/5+(2/5-5/7)]②(2.5-2.5*0.4)÷4速度啊!!
4楼:匿名用户
①2-[1/5+(2/5-5/7)]
=2-1/5-2/5+5/7
=7/5+5/7
=49/35+25/35
=74/35;
②(2.5-2.5*0.4)÷4速度啊!!
=2.5×(1-0.4)÷4
=2.5×0.15
=0.375
如果本题有什么不明白可以追问,如果满意记得采纳如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步
5楼:我们不是他舅
①2-[1/5+(2/5-5/7)]
= 2- (1/5+2/5-5/7)
= 2 - 3/5 +5/7
= (70-21+25) /35
= 74 / 35
②(2.5-2.5*0.4)÷4
= 2.5x(1-0.4) /4
= 2.5 x 0.6 /4
= 1.5/4
= 3/16
脱式计算,能简便的要简便。 23/25除以(3/4+2/5) 1/7x9/13除以5/14除
6楼:莹星
23/25÷
(3/4+2/5)
=23/25÷23/20
=23/25×20/23
=4/5
1/7×9/13÷5/14÷3/13
=1/7×9/13×14/5×13/3
=6/5
=1又1/5
15/16÷(5/12÷5/8+3/8)
=15/16÷(2/3+3/8)
=15/16÷25/24
=9/10
(2/3-1/2+1/6)÷1/24
=(2/3-1/2+1/6)×24
=16-12+4=8
脱式计算(能简便要简便计算)
7楼:匿名用户
(1)3/4 ×
dao8/13+5/13×内3/4-3/4=3/4 ×(8/13+5/13-1)
=3/4×(1-1)
=3/4×0
=0(2)
3/5+(5/8+3/8)÷
容5/6
=3/5+1÷5/6
=3/5+1×6/5
=3/5+6/5
=9/5
(3)(5/6-5/8)×24
=5/6×24-5/8×24
=20-15
=5(4)
7/10÷(1-3/4×2/5)
=7/10÷(1-3/10)
=7/10÷7/10
=1(5)
4/9×[3/4-(7/16-1/4)]
=4/9×(3/4+1/4-7/16)
=4/9×(1-7/16)
=4/9×9/16
=4/16
=1/4
8楼:沐依依
3/4(8/13+5/13-1)=0
3/5+1÷5/6=3/5+6/5=9/520-15=5
7/10÷(1-3/10)=7/10÷7/10=14/9×=4/9×9/16=1/4
脱式计算能简便就要简便
9楼:水色燕子
3/7 × 49/9 - 4/3
8/9 × 15/36 + 1/27
12× 5/6 – 2/9 ×3
8× 5/4 + 1/4
6÷ 3/8 – 3/8 ÷6
4/7 × 5/9 + 3/7 × 5/95/2 -( 3/2 + 4/5 )
7/8 + ( 1/8 + 1/9 )
9 × 5/6 + 5/6
3/4 × 8/9 - 1/3
7 × 5/49 + 3/14
6 ×( 1/2 + 2/3 )
8 × 4/5 + 8 × 11/5
31 × 5/6 – 5/6
9/7 - ( 2/7 – 10/21 )5/9 × 18 – 14 × 2/7
4/5 × 25/16 + 2/3 × 3/414 × 8/7 – 5/6 × 12/1517/32 – 3/4 × 9/24
3 × 2/9 + 1/3
5/7 × 3/25 + 3/7
3/14 ×× 2/3 + 1/6
1/5 × 2/3 + 5/6
9/22 + 1/11 ÷ 1/2
5/3 × 11/5 + 4/3
45 × 2/3 + 1/3 × 15
7/19 + 12/19 × 5/6
1/4 + 3/4 ÷ 2/3
8/7 × 21/16 + 1/2
101 × 1/5 – 1/5 × 21
7/8-5/6+11/12
6/7+5/14-1/2
8-17/42-25/42
1-5/9-(2/3+5/9)
5/9-(1/6+1/12)
11/12-2/9+1/12-7/9
7/12+5/6-3/4
4/5-2/3+7/6
2/3+(5/7-5/14)
8/9-(5/6-3/4)
14/15-(1/4+7/30)
29/30-(14/15-3/4)
13/24+7/8+11/24
3-17/18-19/18
7/9+2/3-4/9
5/8+1/2+3/4
19/24+11/12-3/4
14/15+4/5-2/3
13/12-1/2-1/3
4/9-1/6+4/3
6/7-3/14+1/2
1-1/2+3/4
1/2-1/3-1/6
9/11+7/2-9/22
8/9-1/3+5/6
7/12+1/3-1/4
7/25+4/5-1/2
1/4+2/3-1/12
3/8+5/8-1
3/7-1/2+9/14
235 - 135÷18
35 ×153 – 0.6×53
(45 +14 )÷73 +710
10 - 719 - 1219 + 11925×13 ÷52 ×310
13.09-8.12-4.88
12×103-4500÷75
18 ×[12 ÷(35 ×109 )]
(215 +311 )×15×11
37.5+19.5÷2.5×4
6.9+4.8+3.1
0.456+6.22+3.78
15.89+(6.75-5.89)
4.02+5.4+0.98
5.17-1.8-3.2
13.75-(3.75+6.48)
3.68+7.56-2.68
7.85+2.34-0.85+4.66
35.6-1.8-15.6-7.2
3.82+2.9+0.18+9.1
9.6+4.8-3.6
7.14-0.53-2.47
5.27+2.86-0.66+1.63
13.35-4.68+2.65
73.8-1.64-13.8-5.36
47.8-7.45+8.8
0.398+0.36+3.64
15.75+3.59-0.59+14.2566.86-8.66-1.34
0.25×16.2×4
(1.25-0.125)×8
3.6×102
3.72×3.5+6.28×3.5
36.8-3.9-6.1
15.6×13.1-15.6-15.6×2.14.8×7.8+78×0.52
32+4.9-0.9
4.8×100.1
56.5×9.9+56.5
7.09×10.8-0.8×7.09
25.48-(9.4-0.52)
4.2÷3.5
320÷1.25÷8
18.76×9.9+18.76
3.52÷2.5÷0.4
3.9-4.1+6.1-5.9
5.6÷3.5
9.6÷0.8÷0.4
4.2×99+4.2
17.8÷(1.78×4)
0.49÷1.4
1.25×2.5×32
3.65×10.1
15.2÷0.25÷4
0.89×100.1
146.5-(23+46.5)
3.83×4.56+3.83×5.44
4.36×12.5×8
9.7×99+9.7
27.5×3.7-7.5×3.7
8.54÷2.5÷0.4
0.65×101
3.2×0.25×12.5
(45.9-32.7)÷8÷0.125
3.14×0.68+31.4×0.032
5.6÷1.25÷0.8÷2.5÷0.4
7.2×0.2+2.4×1.4
8.9×1.01
7.74×(2.8-1.3)+1.5×2.263.9×2.7+3.9×7.3
18-1.8÷0.125÷0.8
12.7×9.9+1.27
21×(9.3-3.7)-5.6
15.02-6.8-1.02
5.4×11-5.4
2.3×16+2.3×23+2.3
9.43-(6.28-1.57)
3.65×4.7-36.5×0.37
46×57+23×86
13.7×0.25-3.7÷4
2.22×9.9+6.66×6.7
101×0.87-0.91×87
10.7×16.1-15.1×10.7
0.79×199
4.8+8.63+5.2+0.37
5.93+0.19+2.81
1.76+0.195+3.24
2.35+1.713+0.287+7.651.57+0.245+7.43
6.02+3.6+1.98
0.134+2.66+0.866
1.27+3.9+0.73+16.1
7.5+4.9-6.5
3.07-0.38-1.62
1.29+3.7+2.71+6.3
8-2.45-1.55
3.25+1.79-0.59+1.75
23.4-0.8-13.4-7.2
0.32×403
3.2+0.36+4.8+1.64
1.23+3.4-0.23+6.6
0.25×36
12.7-(3.7+0.84)
36.54-1.76-4.54
0.25×0.73×4
7.6×0.8+0.2×7.6
0.85×199
0.25×8.5×4
1.28×8.6+0.72×8.6
12.5×0.96×0.8
10.4-9.6×0.35
0.8×(4.3×1.25)
3.12+3.12×99
28.6×101-28.6
0.86×15.7-0.86×14.7
2.4×102
2.31×1.2×0.5
14-7.32-2.68
2.64+8.67+7.36+11.33
70÷28
(2.5-0.25)×0.4
9.16×1.5-0.5×9.16
3.6-3.6×0.5
63.4÷2.5÷0.4
4.9÷1.4
3.9÷(1.3×5)
(7.7+1.54)÷0.7
2.5×2.4
2.7÷45
15÷(0.15×0.4)
0.35×1.25×2×0.8
32.4×0.9+0.1×32.4
15÷0.25
4.5÷1.8
4.2÷3.5
930÷0.6÷5
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