Addition

A

10

98+1

99

20

21+7

28

30

50+3

53

40

55+8

63

50

97+3

100

B

10

21+3

24

20

11+2

13

30

40+4

44

40

44+8

52

50

55+9

64

C

10

15+3

18

20

5+6 

11

30

20+2

22

40

23+6

29

50

39+9

48

D

10

33+5

38

20

4+9

13

30

60+6

66

40

16+9

25

50

19+3

22

E - Turn around rule

10

What is the turn around rule for 5+6?

6+5

20

What is the turn around rule for 4+9?

9+4

30

What is the turn around rule for 2+29?

29+2

40

What is the turn around rule for 12+24?

24+12

50

What is the turn around rule for 19+82?

82+19