คณิ�ตค�ดเร็�วโดยใช้�นิ้��วมื�อ

นิ้��วมื�อกั�บต�วเลข

มื�อขวาแทนิ้

หล�กัสิ�บ หล�กัหนิ้�วยแทนิ้

มื�อซ้�าย

มื�อซ้�ายหล�กัสิ�บ มื�อขวาหล�กัหนิ้�วย

1

3

2

10

4

30

20

50

40

5

มื�อซ้�ายหล�กัสิ�บ มื�อขวาหล�กัหนิ้�วย

6

7

8

9

60

80

70

90

00 1 2 3 4

สิ�ญล�กัษณิ"นิ้��วมื�อแทนิ้ต�วเลข

5 6 7 8 9

10 11 12 13 14

15 16 17 18 19

30 31 32 33 34

25 26 27 28 29

20 21 22 23 24

35 36 37 38 39

40 41 42 43 44

45 46 47 48 49

50 51 52 53 54

55 56 57 58 59

60 61 62 63 64

65 66 67 68 69

90 91 92 93 94

70 71 72 73 74

75 76 77 78 79

80 81 82 83 84

85 86 87 88 89

95 96 97 98 99

มืาลองค�ดเลขกั�นิ้เถอะนิ้�องๆ ค�ดให�ท�นิ้ นิ้ะคะ

23 + 11 - 14 + 7 =

27

6 + 23 - 11 - 7 =

11

26 - 10 + 52 - 3 =

65

24 + 5 - 16 - 11 =

2

22 + 52 - 54 + 25

45

35 + 52 - 55 + 52 =

84

34 - 22 + 55 + 32 =

99

54 + 5 - 50 - 4 =

5

99 - 43 - 51 + 2 =

7

7 + 2 - 3 - 5 + 6 =

7

9 - 7 +5 + 1 - 8 =

0

13 + 25 + 1 - 6 - 22 =

11

15 + 33 + 51 - 54 =

45

45 + 53 - 7 + 8 - 76 =

23

14 + 75 - 8 + 6 =

87

78 - 75 + 1 - 4 =

0

89 - 73 + 3 - 8 =

11

24 + 15 + 50 - 55 =

34

55 + 11 - 5 + 6 =

67

69 - 17 + 36 - 75 =

13

63 + 26 - 17 + 15 =

87

45 - 35 + 53 + 16 =

79

19 + 12 + 17 - 37 =

11

36 + 52 - 67 + 76 - 20 =

77

13 + 76 - 88 + 6 - 2 =

5

15 + 2 + 82 - 55 - 31 =

13

22 + 11 + 56 - 78 =

11

2 + 2 + 5 - 3 =

6

9 - 8 + 7 - 6 =

2

4 + 5 - 2 - 1 =

6

3 - 2 + 5 + 2 =

8

4 - 2 + 1 + 5 =

8

9 - 6 -1 + 7 =

9

98 - 87 + 16 - 15 =

12

16 + 72 - 76 +67 =

79

22 + 77 - 86 + 55 =

68

32 + 17 - 28 + 67 =

88

17 + 9 + 50 - 66 =

10

13 + 11 + 9 - 3 =

30

51 + 39 + 8 - 23 =

75

36 + 9 + 50 - 85 =

10

19 + 13 + 9 + 52 =

93

39 + 4 + 51 - 43 =

51

51 + 17 + 17 + 5 =

90

42 + 55 - 87 - 9 =

1

37 - 8 + 11 - 13 =

27

1 + 19 - 12 + 7 =

15

82 - 63 + 2 - 14 =

7

64 - 55 + 7 + 9 =

25

78 + 2 - 11 + 2 =

71

18 + 7 - 6 + 12 =

31

28 + 5 - 4 + 19 =

48

32 - 18 + 7 + 53 =

74

64 - 55 + 8 + 5 =

22

82 - 21 + 4 - 8 =

57

13 + 3 + 15 - 8 =

23

37 + 5 + 2 + 11 =

55

87 + 2 - 55 + 1 =

35

3 + 8 + 23 + 12 =

46

9 + 21 + 13 + 2 =

45

37 - 2 - 14 + 19 =

40

42 - 15 - 23 + 8 =

12

51 + 14 - 22 + 3 =

46

3 + 42 - 11 + 16 =

50

6 + 51 - 33 + 46 =

70

15 + 67 + 3 + 2 =

87

74 + 1 + 9 - 54 =

30

45 + 9 + 18 + 6 =

78

3 + 72 + 7 - 38 =

44

75 - 4 - 26 + 5 =

50

74 - 27 - 7 - 38 =

9

22 + 13 + 9 - 8 =

36

2 + 76 + 6 - 69 =

15

12 - 6 + 7 - 8 =

5