数学1.计算题,能简便的要简便计算。

2020-11-22 16:36:28 字数 4015 阅读 6440

1楼:书语蝶暴磬

1、计算题:

解:1/3÷5/6÷16/15

=1/3×6/5×15/16=3/8

[1-(1/5+1/6)]÷1/12 =[1-11/30]×12=19/30×12=38/5

(5/6-3/4)÷(1/4-1/8)=1/12÷1/8=1/12×8=2/3

应用题:

解:30÷5/6×8/9=36×8/9=32(千克)答:丙筐梨的质量是32千克.

数学1.计算题,能简便的要简便计算。1/3÷5/6÷16/15 【1-(1/5+1/6)】÷1/12 ( 5/6-3/4)÷(1/4-1/8)

2楼:牢廷谦籍念

1、计算题:

解:1/3÷5/6÷16/15

=1/3×6/5×15/16=3/8

[1-(1/5+1/6)]÷1/12 =[1-11/30]×12=19/30×12=38/5

(5/6-3/4)÷(1/4-1/8)=1/12÷1/8=1/12×8=2/3

应用题:

解:30÷5/6×8/9=36×8/9=32(千克)答:丙筐梨的质量是32千克.

能简便计算的要简便计算4/9÷[5/6-(1/6+1/3)] 1/15*(1/3+1/12) 1/4÷(3-5/13-8/13)

3楼:匿名用户

4/9÷[5/6-(1/6+1/3)]

=4/9÷[5/6- 3/6]

=4/9×3

=4/3

1/15*(1/3+1/12)

=1/15*5/12

=1/36

1/4÷(3-5/13-8/13)

=1/4÷(3-1)

=1/8

望采纳。谢谢

4楼:匿名用户

1、4/9÷[5/6-(

1/6+1/3)]=4/9÷[5/6-1/6-1/3)]=4/9÷[2/3-1/3]=4/9÷1/3=4/3

2、1/15*(1/3+1/12)=1/15*(4/12+1/12)=1/15*5/12=1/36

3、1/4÷(3-5/13-8/13)=1/4÷[3-(5/13+8/13)]=1/4÷[3-1]=1/4÷2=1/8

简便计算!(5/6+3/4-1/2)÷1/24 16/11-(1/3÷11/15+1/5)

5楼:乐为人师

(5/6+3/4-1/2)÷1/24

=(5/6+3/4-1/2)×24

=5/6×24+3/4×24-1/2×24=20+18-12

=2616/11-(1/3÷11/15+1/5)=16/11-(5/11+1/5)

=16/11-5/11-1/5

=1-1/5

=4/5

计算下面各题。(能简算的要简算) 1/3×5×2/5÷1/3 1/3×1/15+1

6楼:最美晴天小奕

你敢,很高兴为您解答:

1、解:

原式=5×2/5×1/3÷1/3

=5×2/5×1/3×3

=2×1

=22、解:

原式=1/3×(1/15+1/5)

=1/3×4/15

=4/45

3、解:

原式=3.7×6/5+1.3×6/5

=(3.7+1.3)×6/5

=5×6/5

=64、解:

原式=3/4-(6/7-1/4)×17/9=(3/4+1/4-7/16)×17/9

=9/16×17/9

17/16

计算下列各题,能简便的要简便计算 3 1 6 ÷(1+ 1 3 ×1 3 4 ) ( 1

7楼:手机用户

(1)31 6

÷(1+1 3

×13 4

),=31 6

÷(1+1 3

×7 4

),=31 6

÷(1+7

12),

=19 6

÷1912

,=19 6

×1219

,=2;

(2)(

1 15

+217

)×15×17,

=1 15

×15×17+2

17×15×17,

=17+30,

=47;

(3)(9.6-101 2

÷1.25)÷(11 3

×0.75),

=(9.6-21 2

÷5 4

)÷(4 3

×3 4

),=(9.6-21 2

×4 5

)÷1,

=(9.6-8.4)÷1,

=1.2;

(4)5.66×7.28-3.

16×3.16-3.16×4.

12,=5.66×7.28-3.

16×(3.16+4.12),=5.

66×7.28-3.16×7.

28,=(5.66-3.16)×7.

28,=2.5×7.28,

=18.2;

(5)2012×0.875+201.2×1.25,=2012×0.875+2012×0.125,=2012×(0.875+0.125),

=2012×1,

=2012;

(6)1

1×2+1

2×3+1

3×4+…+1

99×100

,=1-1 2

+1 2

-1 3

+1 3

-1 4

+…+1

99-1

100,

=1-1

100,

=99 100.

计算下面各题,能简便计算的用简便方法计算 2-6/13÷9/26 (1/3+1/4)×36 6/7×(4/5-2/3)÷1/5

8楼:数学新绿洲

2-6/13÷9/26

= 2- (6/13)×(26/9)

=2- 4/3

=2/3

.(1/3+1/4)×36

=(1/3)×36 +(1/4)×36

=12+9

=21.

6/7×(4/5-2/3)÷1/5

=(6/7)×(4/5 - 2/3)×5

=(6/7)×(4 - 10/3)

=(6/7)×(2/3)

=4/7

.3/4-3/4×4/7+9/7

=(3/4)×(1- 4/7)+

9/7=(3/4)×(3/7)+9/7

=(1/4)×(9/7)+ 9/7

=(1/4 +1)×(9/7)

=(5/4)×(9/7)

=45/28

=1又17/28

计算下面各题,能简便的用简便方法计算 5/9+3又1/6÷(3又1/4-1又2/3)×1又1/2

9楼:叫啥知不道

5/9+3又1/6÷(3又1/4-1又2/3)×1又1/2=5/9+19/6*12/19*3/2

=5/9+3

=3又5/9

3.5×1又1/4+1.25×27/10+3.8/(4/5)=1.25*(3.5+2.7+3.8)

=1.25*10

=12.5

3.2/【(2又3/4-19/36)/(1/5+30%)』】=3.2/(40/9)

=0.72

9/10 3/8 1/6能进行简便计算吗?

10楼:妙酒

直接计算

9/10 +3/8+ 1/6

=108/120+45/120+20/120=173/120

计算下面各题,能简算的用简便方法计算

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