Adding 2-digit numbers with decomposition

24+20

• 44

• 62

• 42

• 6

Tags

CCSS.2.OA.A.1

20+64

• 66

• 264

• 84

• 48

Tags

CCSS.2.OA.A.1

39 + 93 =

• 122
• 132
• 112
• 232

35

+38

____

• 73

• 83

• 93

4 4

+36

______

• 80

• 81

• 79

How do you decompose this problem?
56+27

• 60+5 + 20+3
• 50+6 + 20+7
• 70+2 + 60+5
• 50+20 + 40+7

What addition problem do these base ten blocks represent?

• 35+29
• 28+39
• 29+38
• 38+29

Tags

CCSS.2.OA.A.1