六年级数学上册口算题

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六年级数学上册口算题

1.口算

32×3=96,60×3=180,18×10=180,0.007×100=0.7,6÷100=0.06,49×2=98,12×7=84,24×100=2400,3.136×100=313.6,63.6÷100=0.636,43×4=172,72×5=360,2.67×10=26.7,36.7÷10=3.67,1.356÷100=0.,32×4=128,82×5=410,0.136×100=13.6,0.3÷100=0.003,2.3÷10=0.23

2.计算

14×9=126,3.14×2=6.28,4.44×200=888,23×2.00=46,0.13×3=0.39,17×8=136,5×1.7=8.5,2.8×40=112,1.25×80=100,0.6×7=4.2,20×4=80,2.5×4=10,100×5.176=517.6,3.5×20.12×5=353.86,42×3=126,5.26×0=0,3×6.2=18.6,0.25×40=10,1.2×20=24,1.2×3=3.6,2.5×40=100,2.4×10=24,4×0.05=0.2,3.5×2=7,0.37×4=1.48,0.37×4=1.48,2.5×40=100,10×0.07=0.7,1.4×6=8.4,0.18×7=1.26,1.5×4=6,2×0.05=0.1,0.14×4=0.56,3.8×5=19

3.估算它们的结果 0.97×3.62≈3.5,0.31×3≈1,1.2×0.8≈1,0.98×12.1≈12,1.51×2.01≈3,0.46×12≈6,0.8×100.2≈80,2.9×6≈18,9.2×0.3≈3,30×0.3≈9

1.03×5.21≈5,1.03×0.521≈0.5,0.103×5.21≈0.5,10.3×0.521≈5,103×5.21≈500

4.计算

6.8×0.1=0.68,4.8×8=38.4,2.14×2=4.28,1.1×0.8=0.88,0.5×2×0.1=0.1,4×0.4×0.3=0.48,7×0.7×0=0,0.75×2.2×0.3=0.495,8.6+1.4×5=15,2.4×8=19.2,0.6×17=10.2,0.16×5=0.8,0.59×2=1.18,3×0.6×7=12.6,9.7×0.2=1.94,0.3×0.39=0.117,0.17×4=0.68,8.4×8=67.2,5×4×0.5=10,8.6×0.3=2.58,0.08×10=0.8,3.2×0.9=2.88,0.017×7=0.119,8×0.2×5=8

0.5×0.61×0.2=0.061,0.24×4.52+0.24×5.48=2.448,(7.6-0.23)×2.64=19.6584

5.计算

9.4×0.3=2.82。

6.5×0.9=5.85.

第五单元 多边形的面积

第一课时 平行四边形的面积(新授)

口算:

10 ÷ 4 = 2.5,0.36 × 2 = 0.72

1.6 ÷ 16 = 0.1,(1.5 + 2.5) × 4 = 16,1.5 × 4 = 6,6.4 ÷ 0.8

= 8,7.2 × 0.01 = 0.072

1 ÷ 0.125 = 8,0.25 × 8 = 2,8.1 ÷ 0.3 = 27,0.1 × 0.02 =

0.002

3 × 0.2 × 0.5 = 0.3,12 - 6.2 - 3.8 = 1,7 × 1.6 + 7 × 0.4 =

12.6

第二课时 平行四边形的面积(练)

口算:

0.12 × 3 = 0.36,0.49 ÷ 0.7 = 0.7,3 ÷ 2 = 1.5,0.2 × 5 = 1

42 ÷ 0.6 = 70,72 ÷ 0.8 = 90,1.5 ÷ 3 = 0.5,0.2 × 0.5 = 0.1

0.4 × 0.25 = 0.1,0.09 ÷ 0.1 = 0.9,2.8 ÷ 0.7 = 4,7 - 1.9 -

4.1 = 1,3.2 ÷ 0.4 × 0.4 = 3.2,1.9 × 0.1 = 0.19,3.5 × 0.1 = 0.35

第三课时 三角形的面积(新授)

口算:

0.42 ÷ 0.6 = 0.7,3.2 × 0.5 = 1.6

3900 ÷ 30 = 130

0.21 × 0.3 = 0.063,2.5 × 4 = 10,3.6 × 0.1 = 0.36

120 × 70 = 8400,8400 ÷ 72 = 116.67,42 × 20 = 840,2.5

× 4 = 10

5.5 ÷ 11 = 0.5,7.2 ÷ 1.2 = 6,1800 ÷ 300 = 6,910 ÷ 70 =

13,1.3 × 0.5 = 0.65

40 × 90 = 3600,25 × 2 = 50,12 × 40 = 480,4.8 × 2 = 9.6,3.9 ÷ 3.9 = 1

1.1-0.2×4=0.8

2.0.25×4×3=3

3.1.6+1.6×4=8.8

4.0.6-0.47=0.13

5.(31-21)×(72÷6)=120

6.7.5×2.5×4=75

7.0.36÷0.12=3

8.5.6÷100×10=0.56

9.1.25×2.2×8=22

10.8.9×2.02≈18

11.1.39×4.8≈6.67

12.307×5.3≈1630

13.2.02×5≈10

14.1.915×5≈9.575

15.10.11×3.12≈32 16.39.8×20≈796

17.9.82×11≈108

18.1.5×4=6

19.0.12×3=0.36

20.0.49÷0.7≈0.7

21.40×7=280

22.42÷0.6=70

23.72÷0.9=80

24.1.5÷3=0.5

25.5.43+1.47=7.9

26.5-2.8=2.2

27.4×0.25=1

28.0.46÷4.6=0.1

29.4.5×4=18

30.1.8×0.4=0.72

31.3×0.3=0.9

32.0.63÷0.7≈0.9

33.6.3÷0.2=31.5

34.2.4÷8=0.3

35.6.5-5.6=0.9 36.0×12.5=0

37.23.7÷1=23.7

38.1×9.9=9.9

39.2.8÷0.4=7

40.9.7-3.4=6.3

41.180÷3=60

42.360÷9=40

43.240÷4=60

44.300÷5=60

45.63÷3=21

46.÷8=2.625

47.560÷8=70

48.×4×20=320

49.180÷6=30

50.500÷5=100

51.80÷4=20

52.40×7=280

53.478÷6≈80

54.148÷5≈30

55.305÷6≈50 56.243÷8≈30

57.178÷9≈20

58.104÷5≈20

59.138÷7≈20

60.272÷3≈90

61.0.37×10=3.7

62.0.37×100=37

63.0.37×1000=370

64.2.5×4=10

65.25×4=100

66.0.25×4=1

67.4.8×9=43.2

68.0.12×3=0.36

69.5×5.8=29

70.0.2×5=1

71.0.28×3=0.84

72.7.9×2=15.8

73.0.16×4=0.64

74.1.8÷0.3=6

75.0.1×0.2=0.02 76.1.13×2=2.26

77.0.5×4=2

78.6×0.4=2.4

79.0.8×7=5.6

80.0.24×2=0.48

81.3.5×0.1=0.35

82.0.2×0.4=0.08

83.0.7×8=5.6

84.1.5×6=9

85.1.3×0.07=0.091

86.10.3×2=20.6

87.0.7×0.7=0.49

88.1.1×10=11

89.3.5×0.1=0.35

90.0.2×0.4=0.08

91.0.48×2=0.96

92.1.3×0.5=0.65

93.0.6×5=3

94.5.4÷0.9=6

95.7×12=84 96.8×(5×4)=160

97.(24+36)×5=300

98.(8×5)×4=160

99.24×5+36×5=300

100.0.96÷2=0.48

101.3.6÷0.4=9

102.0.48÷0.8=0.6

103.0.56÷0.7≈0.8

104.0.72÷0.6=1.2

105.0.24÷0.4=0.6

106.1.8÷2=0.9

107.4.8÷0.6=8

108.0.63÷0.09=7

109.0.72÷0.8=0.9

110.8.4÷4=2.1

111.2.8÷0.7=4

112.1.8÷0.3=6

113.1、2和5的倍数的特征是:它们都是偶数的倍数,即1、2、4、5、8、10等等。