Review

Front

24 + 76 + 45 + 55

Back

200

Front

64 + 33 + 26 + 67

Back

190

Front

36 + 35 + 24 + 25

Back

120

Front

33 + 34 + 45 – 13 – 14 – 15

Back

70

Front

28 + 43 + 72 + 29 + 11 + 37

Back

220

Front

2 + 4 + 6 + … + 16 + 18

Back

90

Front

45 - 4 + 25 - 6

Back

60

Front

1 + 3 + 5 + 7 + 9 + 11 + 13 + 15

Back

64

Front

1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 + 9

Back

5

Front

37 + 13 – 68 – 13 + 51

Back

20