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计算:(1)-13+514-317-514+1267;(2)3.75-(-12)+(-423

2022-08-15 16:22:57 问答库 阅读 207 次

问题详情

计算:
(1)-1

3

+51

4

-31

7

-51

4

+126

7


(2)3.75-(-1

2

)+(-42

3

)+(-0.5)+(-63

4

);
(3)32

5

+(-27

8

)+(-35

12

)+53

5

+(-11

8

)+55

12


(4)(-45

8

)+(-3.75)+(-23

8

)+(-31

4

);
(5)(-123)+31

3

+(-41

4

)+(123)+(-1

3

)+(-3

4

);
(6)25×3

4

+(-25)×(-1

4

);
(7)(-3)2÷21

4

×(-2

3

)2+4-22×(-1

3

);
(8)(-79)÷21

4

+4

9

×(-29);
(9)[30-(7

9

+5

6

-11

12

)×36]÷(-5)
(10)(-1)3-(1-1

2

)÷3×[3-(-3)2]
(11)(1

4

+1

12

-7

18

-1

36

)÷1

36

-2×(-1

3

)
(12)-22-(1-1

5

×0.2)÷(-2)3
(13)9917

18

×(-9)
(14)-369

11

÷9
(15)(-7)×(5)-90÷(-15)
(16)(-2

3

)×(-18)-(0.25)×(-6)÷(-5)

参考答案

(1)-13+514-514-317+1267
=-13+957
=9821;

(2)3.75-(-12)+(-423)+(-0.5)+(-634)
=3.75+12-423-0.5-634
=3.75-634+12-0.5-423
=-3-423
=-723;

(3)325+(-278)+(-3512)+535+(-118)+5512
=325+535+(-278)+(-118)+(-3512)+5512
=9-4+2
=7;

(4)(-458)+(-3.75)+(-238)+(-314)
=(-458)+(-238)+(-314)+(-3.75)
=-7-7
=-14;

(5)(-123)+313+(-414)+(+123)+(-13)+(-34)
=(-123)+(+123)+313+(-13)+(-414)+(-34)
=0+3-5
=-2;

(6)25×34+(-25)×(-14)
=25×(34+14)
=25;

(7)(-3)2÷214×(-23)2+4-22×(-13);
=9×49×49+4-4×(-13)
=169+4+43
=649;

(8)(-79)÷214+49×(-29)
=(-79)×49+49×(-29)
=(-79-29)×49
=-108×49
=-48;

(9)[30-(79+56-1112)×36]÷(-5)
=[30-(79×36+56×36-1112×36)]÷(-5)
=[30-28-30+33]÷(-5)
=5÷(-5)
=-1;

(10)(-1)3-(1-12)÷3×[3-(-3)2]
=-1-12×13×[3-9]
=-1-12×13×[3-6]
=-1+1
=0;

(11)(14+112-718-136)÷136-2×(-13)
=(14+112-718-136)×36+23
=14×36+112×36-718×36-136×36+23
=9+3-14-1+23
=-73;

(12)-22-(1-15×0.2)÷(-2)3
=-22-(1-125)÷(-8)
=-22-2425×(-18)
=-22+325
=-212225;

(13)991718×(-9)
=(100-118)×(-9)
=100×(-9)-118×(-9)
=-900+12
=-89912;

(14)-36911÷9
=-36×19-911×19
=-4111;

(15)(-7)×(+5)-90÷(-15)
=-35+6
=-29;

(16)(-23)×(-18)-(+0.25)×(-6)÷(-5)
=12-(-1.5)÷(-5)
=12-0.3
=11.7.

考点: