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解方程计算题 计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4

火烧 2022-07-14 04:47:47 1039
计算题:(1)-5+(-15)-(-17)- -12 (2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4 计算题:(1)-5+(-15)-(-17)- -12 (

计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4  

计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4

(1)-5+(-15)-(-17)-|-12|
=-5+(-15)+17+12
=-20+29
=9;
(2)(+4.3)-(-4)+(-2.3)-(+4)
=4.3+4+(-2.3)+(-4)
=8.3+(-6.3)
=2;
(3)-19

19 20

×(-12)
=(20-

1 20

)×12
=20×12-

1 20

×12
=240-

3 5

=239

2 5


(4)(1

3 4

-

7 8

-

7 16

)×(1

1 7


=

7 4

×

8 7

-

7 8

×

8 7

-

7 16

×

8 7

=2-1-

1 2

=

1 2


(5)3-5-4÷(-12)
=-2+4×

1 12

=-2×

1 3

=-

2 3


(6)60-1998×15

6 7

÷2×0
=60-0
=60;
(7)(-5)÷(-

1 5

)×5
=5×

1 5

×5
=5;
(8)25×

3 4

-(-25)×

1 2

+25×

1 4

=25×(

3 4

+

1 2

+

1 4


=25×

3 2

=

75 2

计算题(1)(-12)-5+(-14)-(-39)(2) (-24)×( 1 8 - 1 3 + 1 4 )+(-

(1)原式=-12-5-14+39=-31+39=8;              
(2)原式=-3+8-6-8=-9;      
(3)原式=-16×(-

1 4 )×

1 4

-

1 4

×(-12)+5=9.

计算题(1)(+8)+(-6)(2)(-6)-(-5)(3)-2×3×(-4)(4)12-(-18 )+(-7 )-15(5)17-8÷

(1)(+8)+(-6),
=+(8-6),
=2;

(2)(-6)-(-5),
=-6+5,
=-1;

(3)-2×3×(-4),
=2×3×4,
=24;

(4)12-(-18 )+(-7 )-15,
=12+18-7-15,
=30-22,
=8;

(5)17-8÷(-2)+4×(-3),
=17+4-12,
=21-12,
=9;

(6)(-

1 6

+

3 4

-

1 12

)×48,
=-

1 6

×48+

3 4

×48-

解方程计算题 计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4
1 12

×48,
=-8+36-4,
=-12+36,
=24;

(7)

1 2

+(-

2 3

)+

4 5

+(-

1 2

)+(-

1 3

),
=[

1 2

+(-

1 2

)]+[(-

2 3

)+(-

1 3

)]+

4 5


=-1+

4 5


=-

1 5

(8)|-1-2|-1÷(-

1 2

)×2,
=3-1×(-2)×2,
=3+4,
=7.

计算题:(1)-20+(-17)-(-18)-11;(2)(-1)100×5+(-2)4÷4;(3)用简便方法计算:(14?16+12

(1)-20+(-17)-(-18)-11
=-20-17+18-11
=-48+18
=-30;

(2)(-1)100×5+(-2)4÷4
=1×5+16÷4
=5+4
=9;

(3)(

1 4

?

1 6

+

1 2

)×(-12)
=-

1 4

×12+

1 6

×12-

1 2

×12
=-3+2-6
=-7;

(4)-(-3)2-|(-5)3|×(-

2 5

)2-18÷|-32|
=-9-125×

4 25

-18÷9
=-9-20-2
=-31.

计算题:(1)(+18)+(-12)(2) (-1.5)× 4 5 ÷(- 2 5 )× 3 4 (3)

(1)(+18)+(-12)=18-12=6;
(2)原式=-

3 2 ×

4 5

×(-

5 2

)×

3 4

=

9 4


(3)原式=48×

2 3

-48×

1 4

-48×

3 8

=32-12-18=2;
(4)原式=-4-(-27)×1=-4+27=23.

计算题.(1)12-(-18)+(-7)-15(2)(-1)10×2+(-2)3÷4+(-22)(3)1÷(-5)×(-15)(4)(

(1)原式=12+18-7-15=30-22=8;
(2)原式=2-2-4=-4;
(3)原式=1×(-

1 5

)×(-

1 5

)=

1 25


(4)原式=8-36+4=12-36=-24.

计算题:(1)(-12)÷4×(-6)÷2(2) (- 5 8 )×(-4 ) 2 -0.25×(-5)×(-4 ) 3 (3

(1)(-12)÷4×(-6)÷2=(-12)×

1 4 ×(-6)×

1 2

=9.
(2) (-

5 8

)×(-4 ) 2 -0.25×(-5)×(-4 ) 3
= -

5 8

×16-0.25×(-4)×(-5)×(-4 ) 2 =-10-80=-90 .
(3) (-1

1 2

)-1

1 4

+(-2

1 2

)-(-3

3 4

)-(-1

1 4

)
= -1

1 2

-1

1 4

-2

1 2

+3

3 4

+1

1 4

= (-1

1 4

+1

1 4

)+(-1

1 2

-2

1 2

)+3

3 4

=0-4+3

3 4

=-

1 4

(4) (-3 ) 3 ÷2

1 4

×(-

2 3

) 2 +4- 2 2 ×(-

1 3

)
= -27×

4 9

×

4 9

+4-4×(-

1 3

)
= -

16 3

+4+

4 3

=0 .

计算题:(1)-7+4(2)(-2)×5(3)(- 3 4 - 5 9 + 7 12 )÷

(1)-7+4=-(7-4)=-3;   …(3分)

(2)(-2)×5=-10;…(3分)

(3)(-

3 4

-

5 9

+

7 12

)÷

1 36

=(-

3 4

-

5 9

+

7 12

)×36
=-

3 4

×36-

5 9

×36+

7 12

×36
=-27-20+21
=-26…(3分)

(4)|-

7 9

2 3

-

1 3

×(-3) 2
=

7 9

×

3 2

-

1 3

×9…(2分)
=

7 6

-3
=-

11 6

.…(3分)

计算题(1)-7+13-6+20(2)1+(-2)+|-2-3|-5(3)(+4.3)-(-4)+(-2.3)-(+4)(4)(-34?59+712)

(1)原式=(-7-6)+(13+20)=-13+33=20;
(2)原式=1-2+5-5=-1;
(3)原式=4.3+4-2.3-4=2;
(4)原式=(-

3 4

-

5 9

+

7 12

)×36=-27-20+21=-26;
(5)原式=-3×(-6)÷2=

1 2

÷2=

1 4


(6)原式=-1

1 2

-1

1 4

-2

1 2

+3

3 4

+1

1 4

=-5

1 4

+5=-

1 4

  
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