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整式的加减计算题 计算题18.4-2.7+1.6-0.3 ( 4 7 + 4 21 - 1 3 )×42 1 6

火烧 2022-11-23 09:20:35 1065
计算题18.4-2.7+1.6-0.3 ( 4 7 + 4 21 - 1 3 )×42 1 6 计算题18.4-2.7+1.6-0.3 ( 4 7 + 4 21 - 1 3 )×42 1 6 (1)1

计算题18.4-2.7+1.6-0.3 ( 4 7 + 4 21 - 1 3 )×42 1 6  

计算题18.4-2.7+1.6-0.3 ( 4 7 + 4 21 - 1 3 )×42 1 6

(1)18.4-2.7+1.6-0.3,
=(18.4+1.6)-(2.7+0.3),
=20-3,
=17;

(2)4.28×7.75+0.428×22.5,
=0.428×77.5+0.428×22.5,
=0.428×(77.5+22.5),
=0.428×100,
=42.8;

(3)(

4 7

+

4 21

-

1 3

)×42,
=

4 7

×42+

4 21

×42-

1 3

×42,
=24+8-14,
=18;

(4)(

1 6

+

7 15

)÷

2 5

+

5 12


=

19 30

×

5 2

+

5 12


=

19 12

+

5 12


=2;

(5)

1 6

-

3 8

÷

7 4

×

7 12


=

1 6

-

3 8

×

4 7

×

7 12


=

1 6

-

1 8


=

1 24

(6)3.6÷[0.6×(0.8+0.7)],
=3.6÷[0.6×1.5],
=3.6÷0.9,
=4.

计算题:(1) - 2 3 ×(-6)+ 7 4 ÷(- 7 8 ) ;(2) - 1 4 +[1 1

(1) -

2 3 ×(-6)+

7 4

÷(-

7 8

)
=4+(-2)
=2;
(2) - 1 4 +[1

1 24

-(

3 8

+

1 6

-

3 4

)×24]÷5
=-1+[1

1 24

-

3 8

×24-

1 6

×24+

3 4

×24]÷5
=-1+[1

1 24

-9-4+18]÷5
=-1+

145 24

×

1 5

=-1+

29 24

=

5 24

计算题.12 ÷ 4 7 1 3 ÷ 1 4 5 6 ÷ 5 18

12 ÷

4 7 =12×

7 4

=21;

1 3

÷

1 4

=

1 3

×4 =

4 3

5 6

÷

5 18

=

5 6

×

18 5

=3.

计算题(1)-21-12+33+12-67(2) ( 1 2 - 3 4 + 5 6 - 7 12 )÷(-

(1)原式=(-21-12-67)+(33+12)
=-110+45
=-55;

(2)原式=(

1 2

-

3 4

+

5 6

-

7 12

)×(-36)
=-18+27-30+21
=0;

(3)原式=48÷(-8+4)
=48÷(-4)
=-12;

(4)原式=-1×(-5)÷(9-10)
=-1×(-5)÷(-1)
=-5.

计算题:(1)2-5+4-(-7)+(-6)(2)(-1 1 3 )÷0.8×(- 6 7 )(3)(2

(1)原式=2-5+4+7-6
=-3+4+7-6
=1+7-6
=2;

(2)原式=(-

5 3

)÷

4 5

×(-

6 7


=(-

5 3

)×

5 4

×(-

6 7


=(-

25 12

)×(-

6 7


=

25 14

(3)原式=(

9 4

-

9 2

-

9 8

)×(-

8 9


=

9 4

×(-

8 9

)-

9 2

×(-

8 9

)-

9 8

×(-

8 9


=-2+4+1
=3;

(4)原式=-4×(-

1 2

)+8×

1 4

=2+2
=4;

(5)原式=-1+8÷(-2)+8
=-1-4+8
=5.

计算题:(1)-3-(-4)+7(2) 8×(- 4 5 )÷|-16| (3) ( 3 8 - 1 6 -

(1)-3-(-4)+7
=-3+4+7
=(-3)+(4+7)
=(-3)+11
=+(11-3)
=8;
(2) 8×(-

4 5 )÷|-16|
= 8×(-

4 5

)÷16
= 8×(-

4 5

1 16

=- 8×

4 5

×

整式的加减计算题 计算题18.4-2.7+1.6-0.3 ( 4 7 + 4 21 - 1 3 )×42 1 6
1 16

=-

2 5


(3) (

3 8

-

1 6

-

3 4

)×(-24)
=

3 8

×(-24)-

1 6

×(-24)-

3 4

×(-24)
=-9+4+18
=(-9)+(4+18)
=(-9)+22
=+(22-9)
=13;
(4) (-2) 2 -|-6|+2-3×(-

1 3

)
=4-6+2+1
=(4+2+1)-6
=7-6
=1;
(5) (-

1 2

)+2× (-0.5) 2 + 3 2 ÷(-3)
=(-

1 2

)+2×0.25+9÷(-3)
=(-

1 2

)+0.5+(-3)
=[(-0.5)+0.5]+(-3)
=0+(-3)
=-3;
(6) - 3 2 -[-5-0.2÷

4 5

× (-2) 2 ]
=-9-[-5-

1 5

×

5 4

×4]
=-9-(-5-1)
=-9-[(-5)+(-1)]
=-9-(-6)
=-9+6
=-(9-6)
=-3.

计算题:(1)(-5)-(+4)+(-8)-(+7)+(+24);(2)-42÷4×(-14)+2×(-3)-|-5|;(3)-5-[(

(1)原式=-5-4-8-7+24=-24+24=0;
(2)原式=-16×

1 4

×(-

1 4

)-6-5=1-6-5=-10;
(3)原式=-5-(-8+

2 5

)÷(-2)=-5-

21 5

=-9

1 5


(4)原式=8+2-36+4-1=-23.

脱式计算题①( 3 7 + 1 3 )×42+ 1 2 ②18÷[ 5 6 -(

①(

3 7 +

1 3

)×42+

1 2

=

3 7

×42+

1 3

×42+

1 2


=18+14+

1 2


=32+

1 2


=32

1 2

②18÷[

5 6

-(

5 8

-

1 6

)],
=18÷[

5 6

+

1 6

-

5 8

],
=18÷[1-

5 8

],
=18÷

3 8


=48;

2 15

×[7.5-(

1 8

+0.125÷

1 7

)]
=

2 15

×[7.5-(

1 8

×1+

1 8

×7)],
=

2 15

×[7.5-

1 8

×(1+7)],
=

2 15

×[7.5-1],
=

2 15

×6.5,
=

13 15

计算题:(1)(-17)+59+(-37)(2)(+7)-(+8)+(-3)-(-6)+2(3)( 1 4 + 1

(1)原式=-17+59-37
=5;

(2)原式=7-8-3+6+2
=4;

(3)原式=

1 4

×(-12)+

1 6

×(-12)-

1 2

×(-12)
=-3-2+6
=1;

(4)原式=

3 2

×(-

5 6


=-

5 4

(5)原式=(-

9 5

)×

25 9

+(-

3 8

)÷(-

3 4


=-5+

1 2

=-

9 2

  
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