有理数的减法题100道

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64+28+36+72

90-（72-70）=90-2=88

42+（33+7）=42+40 =82

78-（36-6）=78-30=48

75-20+40 =55+40=95

88-8+60 =80+60 =140

70-（48+2）=70-50=20

(45-17)+(9-3)=28+6=34, (45-17)+(9-6)=28+3=31, (45-18)+(9-3)=27+6=33

(45-18)+(9-6)=27+3=30, (45-27)+(9-3)=18+6=24, (45-27)+(9-6)=18+3=21

(45-28)+(9-3)=17+6=23, (45-28)+(9-6)=17+3=20, (46-17)+(8-3)=29+5=34

(46-17)+(8-5)=29+3=32, (46-19)+(8-3)=27+5=32, (46-19)+(8-5)=27+3=30

(46-27)+(8-3)=19+5=24, (46-27)+(8-5)=19+3=22, (46-29)+(8-3)=17+5=22

(46-29)+(8-5)=17+3=20, (54-16)+(9-2)=38+7=45, (54-16)+(9-7)=38+2=40

(54-18)+(9-2)=36+7=43, (54-18)+(9-7)=36+2=38, (54-36)+(9-2)=18+7=25

(54-36)+(9-7)=18+2=20, (54-38)+(9-2)=16+7=23, (54-38)+(9-7)=16+2=18

(57-18)+(6-2)=39+4=43, (57-18)+(6-4)=39+2=41, (57-19)+(6-2)=38+4=42

(57-19)+(6-4)=38+2=40, (57-38)+(6-2)=19+4=23, (57-38)+(6-4)=19+2=21

(57-39)+(6-2)=18+4=22, (57-39)+(6-4)=18+2=20, (63-15)+(9-2)=48+7=55

(63-15)+(9-7)=48+2=50, (63-18)+(9-2)=45+7=52, (63-18)+(9-7)=45+2=47

(63-45)+(9-2)=18+7=25, (63-45)+(9-7)=18+2=20, (63-48)+(9-2)=15+7=22

(63-48)+(9-7)=15+2=17, (64-25)+(8-1)=39+7=46, (64-25)+(8-7)=39+1=40

(1) (-9)-(-13)+(-20)+(-2)

(2) 3+13-(-7)/6

(3) (-2)-8-14-13

(4) (-7)*(-1)/7+8

(5) (-11)*4-(-18)/18

(6) 4+(-11)-1/(-3)

(7) (-17)-6-16/(-18)

(8) 5/7+(-1)-(-8)

(9) (-1)*(-1)+15+1

(10) 3-(-5)*3/(-15)

(11) 6*(-14)-(-14)+(-13)

(12) (-15)*(-13)-(-17)-(-4)

(13) (-20)/13/(-7)+11

(14) 8+(-1)/7+(-4)

(15) (-13)-(-9)*16*(-12)

(16) (-1)+4*19+(-2)

(17) (-17)*(-9)-20+(-6)

(18) (-5)/12-(-16)*(-15)

(19) (-3)-13*(-5)*13

(20) 5+(-7)+17-10

(21) (-10)-(-16)-13*(-16)

(22) (-14)+4-19-12

(23) 5*13/14/(-10)

(24) 3*1*17/(-10)

(25) 6+(-12)+15-(-15)

(26) 15/9/13+(-7)

(27) 2/(-10)*1-(-8)

(28) 11/(-19)+(-14)-5

(29) 19-16+18/(-11)

(30) (-1)/19+(-5)+1

(31) (-5)+19/10*(-5)

(32) 11/(-17)*(-13)*12

(33) (-8)+(-10)/8*17

(34) 7-(-12)/(-1)+(-12)

(35) 12+12-19+20

(36) (-13)*(-11)*20+(-4)

(37) 17/(-2)-2*(-19)

(38) 1-12*(-16)+(-9)

(39) 13*(-14)-15/20

(40) (-15)*(-13)-6/(-9)

(41) 15*(-1)/12+7

(42) (-13)+(-16)+(-14)-(-6)

(43) 14*12*(-20)*(-13)

(44) 17-9-20+(-10)

(45) 12/(-14)+(-14)+(-2)

(46) (-15)-12/(-17)-(-3)

(47) 6-3/9/(-8)

(48) (-20)*(-15)*10*(-4)

(49) 7/(-2)*(-3)/(-14)

(50) 13/2*18*(-7)

答案：

1 -18

2 103/6

3 -37

4 9

5 -43

6 -(20/3)

7 -(199/9)

8 54/7

9 17

10 2

11 -83

12 216

13 1021/91

14 27/7

15 -1741

16 73

17 127

18 -(2885/12)

19 842

20 5

21 214

22 -41

23 -(13/28)

24 -(51/10)

25 24

26 -(268/39)

27 39/5

28 -(372/19)

29 15/11

30 -(77/19)

31 -(29/2)

32 1716/17

33 -(117/4)

34 -17

35 25

36 2856

37 59/2

38 184

39 -(731/4)

40 587/3

41 23/4

42 -37

43 43680

44 -22

45 -(118/7)

46 -(192/17)

47 145/24

48 -12000

49 -(3/4)

50 -819

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