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MENTAL COMPUTATION - PowerPoint PPT Presentation


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MENTAL COMPUTATION. 1. ADDITION AND SUBTRACTION. (1). 6 + 5 =. (2). 3 + 9 =. (3). 6 + 6 =. (4). 7 + 7 =. (5). 9 + 8 =. (6). 16 + 63 =. (7). 43 + 12 =. (8). 23 + 19 =. (9). 27 + 47 =. (10). 37 + 34 =. (11). 48 + 24 =. (12). 22 + 59 =. (13). 11 + 70 =. (14). 9 + 43 =.

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slide1

MENTAL COMPUTATION

1. ADDITION AND SUBTRACTION

slide2

(1)

6 + 5 =

slide3

(2)

3 + 9 =

slide4

(3)

6 + 6 =

slide5

(4)

7 + 7 =

slide6

(5)

9 + 8 =

slide7

(6)

16 + 63 =

slide8

(7)

43 + 12 =

slide9

(8)

23 + 19 =

slide10

(9)

27 + 47 =

slide11

(10)

37 + 34 =

slide12

(11)

48 + 24 =

slide13

(12)

22 + 59 =

slide14

(13)

11 + 70 =

slide15

(14)

9 + 43 =

slide16

(15)

17 + 18 =

slide17

(16)

97 - 32 =

slide18

(17)

85 - 35 =

slide19

(18)

76 - 42 =

slide20

(19)

99 - 75 =

slide21

(20)

79 - 26 =

slide22

(21)

78 - 35 =

slide23

(22)

51 - 39 =

slide24

(23)

81 - 49 =

slide25

(24)

62 - 37 =

slide26

(25)

55 - 27 =

slide27

(26)

81- = 40

slide28

(27)

45- = 15

slide29

(28)

- 80 =16

slide30

(29)

-10 = 54

slide31

(30)

- 50 = 20