口算心算速算

42 -12 -108 = 30 -108 = -78

43 -3 -92 = 40 -92 = -52

44 + 6 -76 = 50 -76 = -26

45 + 15 -60 = 60 -60 = 0

46 + 24 -44 = 70 -44 = 26

47 + 33 -28 = 80 -28 = 52

48 + 42 -12 = 90 -12 = 78

49 + 51 + 4 = 100 + 4 = 104

50 + 60 + 20 = 110 + 20 = 130

小学生口算心算速算练习题：51 + 69 + 36 = 120 + 36 = 156

52 + 78 + 52 = 130 + 52 = 182

53 + 87 + 68 = 140 + 68 = 208

54 + 96 + 84 = 150 + 84 = 234

55 -45 -200 = 10 -200 = -190

56 -36 -184 = 20 -184 = -164

57 -27 -168 = 30 -168 = -138

58 -18 -152 = 40 -152 = -112

59 -9 -136 = 50 -136 = -86

60 + 0 -120 = 60 -120 = -60

61 + 9 -104 = 70 -104 = -34

62 + 18 -88 = 80 -88 = -8

63 + 27 -72 = 90 -72 = 18

64 + 36 -56 = 100 -56 = 44

65 + 45 -40 = 110 -40 = 70

66 + 54 -24 = 120 -24 = 96

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