Unit 2 pt1 Money, Addition Properties and Mental Math

Add using mental math:
  45
+24
____

• 69
• 88
• 96
• 21

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.6

CCSS.2.NBT.B.7

Subtract using mental math:
  96
- 45
____

• 51
• 24
• 58
• 91

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

Subtract using mental math:
  73
- 12
____

• 61
• 65
• 85
• 74

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

Add using mental math:
  35
+14
____

• 49
• 66
• 88
• 22

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.6

Which is the missing number: 7 + ___ = 20

• 10

• 12

• 13

• 14

Tags

CCSS.1.OA.D.8

3 + 5 = 5 + 3

• Commutative Property

• Associative Property

• Identity Property

5 + 0 = 5

• Commutative Property

• Associative Property

• Identity Property

5 + (4 +1) = (5 + 4) + 1

• Commutative Property

• Associative Property

• Identity Property

Which property can be added in any ORDER ?

• Commutative Property

• Associative Property

• Identity Property

Which property shows how any number added to ZERO is the number?

• Commutative Property

• Associative Property

• Identity Property