1楼:妙酒
2/7×14/15=4/15
6/7÷3=2/7
12÷6/11=22
3/4÷9/16=4/3
25×40%=10
20×【1/4-1/5]=1
1÷2/5=5/2
2楼:匿名用户
‘’‘’‘;4 ;;’‘ 2 ’‘ 2
第一个 —— 第二个— 第三个 — 第四个10 第五个1 第六个2.5
15;; ;; 7 ;; 11
你几年的的啊
3/10÷20= 9÷3/4= 5/8×1/4= 6/11×5/12= 5/9-1/6= 2/3÷4/7= 1/8+3/4= 5/6÷5/7= 先化简再求比值 21:49
3楼:白日衣衫尽
3/10÷20=3/200
9÷3/4= 9x4/3=12
5/8×1/4=5/32
6/11×5/12=1/11x5/2=5/22
5/9-1/6=10/18-3/18=7/18
2/3÷4/7= 2/3x7/4= 14/12=7/6
1/8+3/4= 1/8+6/8= 7/8
5/6÷5/7=5/6x7/5=7/6
21:49=7x3:7x7=3:7=3/7
1.6:2.4=0.8x2: 0.8x3= 2: 3=2/3
2.4/8=0.3x8/8=0.3
3/7:2/9= 3/7x9/2=27/14
9/7-8/19-11/19=9/7-(8/19+11/19)=9/7-1=2/7
5/12÷8+1/8×7/12 =5/12x1/8+1/8×7/12=(1/8)x(5/12+7/12)=(1/8)x1=1/8
解方程6x-2.4=0.36 ,6x=0.36+.2.4,6x=2.76, x=0.46
5x÷15=15 , x÷5=15, x=15*5, x=75
8x-0.5x=30,7.5x=30, x=4
求北师大版五年级下册数学题,用简便方法计算例如:4/7+6/11+5/11+3/7=2之类的题。急需60道。谢谢
4楼:匿名用户
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/273. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/97. 5/2 -( 3/2 + 4/5 )8. 7/8 + ( 1/8 + 1/9 )9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/514. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )16. 5/9 × 18 – 14 × 2/717.
4/5 × 25/16 + 2/3 × 3/418. 14 × 8/7 – 5/6 × 12/1519. 17/32 – 3/4 × 9/2420.
3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ××
2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/225. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 1527. 7/19 + 12/19 × 5/628. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/230. 101 × 1/5 – 1/5 × 2131.50+160÷40
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42
37.812-700÷(9+31×11)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.
8×0.55)÷8.543.
0.12× 4.8÷0.
12×4.844.(3.
2×1.5+2.5)÷1.
645.6-1.6÷4= 5.
38+7.85-5.37=46.
7.2÷0.8-1.
2×5= 6-1.19×3-0.43=47.
6.5×(4.8-1.
2×4)=
49.5.8×(3.
87-0.13)+4.2×3.
7450.32.52-(6+9.
728÷3.2)×2.551.
[(7.1-5.6)×0.
9-1.15] ÷2.552.
5.4÷[2.6×(3.
7-2.9)+0.62]53.
12×6÷(12-7.2)-6
(54)12×6÷7.2-6
(55)0.68×1.9+0.32×1.9(56)(58+370)÷(64-45)
(57)420+580-64×21÷28
(58)(136+64)×(65-345÷23)(59)48.10.15-10.
75×0.4-5.71.
18.1+(3-0.299÷0.
23)×12.(6.8-6.
8×0.55)÷8.5
3.0.12× 4.8÷0.12×4.8
4.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
5.6-1.6÷4= 5.
38+7.85-5.37=6.
7.2÷0.8-1.
2×5= 6-1.19×3-0.43=7.
6.5×(4.8-1.
2×4)= 0.68×1.9+0.
32×1.9
8.10.15-10.
75×0.4-5.79.
5.8×(3.87-0.
13)+4.2×3.7410.
32.52-(6+9.728÷3.
2)×2.511.[(7.
1-5.6)×0.9-1.
15] ÷2.512.5.
4÷[2.6×(3.7-2.
9)+0.62]13.12×6÷(12-7.
2)-6
14.12×6÷7.2-6
15.33.02-(148.4-90.85)÷2.5158+262+138
375+219+381+225
用计算器计算下面各题.1÷15= 2÷15= 3÷15= 4÷15= 5÷15= 6÷15= 7÷15= 8÷15= 9÷15= 10÷15= 11÷1
5楼:手机用户
1÷15=0.066…
2÷15=0.133…
3÷15=0.2
4÷15=0.266…
5÷15=0.333…
6÷15=0.4
7÷15=0.466…
8÷15=0.533…
9÷15=0.6
10÷15=0.66…
11÷15=0.733…
12÷15=0.8
13÷15=0.866…
14÷15=0.933…
15÷15=1
发现:当被除数为1的n倍时,商就为0.066…的n倍.23÷15=1.533…
37÷15=2.466…
47÷15=3.133…
69÷15=4.6
154÷15=10.266…
简算,0.2×3/2除3/20 11/3×6/5×15/11 (4/9+2/5)除2/15
6楼:潇杨
: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
直接写得数.0.7×11= 36÷0.1= 0.6×30= 7.3×0.1= 2.4×5= 7.2÷0.72= 6.4÷0.8= 3.2÷8=
7楼:爱刷
0.7×11=7.7,
36÷0.1=360,
0.6×30=18,
7.3×0.1=0.73,
2.4×5=12,
7.2÷0.72=10,
6.4÷0.8=8,
3.2÷8=0.4,
1.1×3=3.3,
0.15÷0.03=5.
算出得数(要写计算过程)5/7÷5/6。12x7/8。1-1/2-1/3。7/11÷14。
8楼:尹大海的爱琦琦
5/7/(5/6)
=5/7x6/5
=6/7
12x7/8=3x7/2=21/2=10.51-1/2-1/3
=1/2-1/3
=3/6-2/6
=1/6
7/11/(14)
=7/11x1/14
=1/22
9楼:八月冰霜一场梦
7/5÷5/6
=5/7×6/5
=6/7
7÷{4/11×(3/4+1/6)}简算
10楼:匿名用户
=7÷[4/11×11/12]
=7÷1/3=21
11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
7/9x3/11÷(3/4-1/6)
12楼:匿名用户
7/9x3/11÷(3/4-1/6)
=7/33÷(9/12-2/12)
=7/33÷7/12
=7/33x12/7
=4/11