Adding 2-digit numbers with decomposition

Front

24+20

Back

44

Front

20+64

Back

84

Front

39 + 93 =

Back

132

Front

35 + 38 = ____

Back

73

Front

4 + 36 = ______

Back

80

Front

How do you decompose this problem?
56+27
Options: 60+5 + 20+3, 50+6 + 20+7, 70+2 + 60+5, 50+20 + 40+7

Back

50+6 + 20+7

Front

What addition problem do these base ten blocks represent? Options: 35+29, 28+39, 29+38, 38+29

Back

28+39