8+2=10, so 2+8=

• 8

• 2

• 10

• 12

Tags

CCSS.1.OA.B.3

CCSS.1.OA.C.6

2+7=9, so 7+2=

• 9

• 12

• 15

• 2

Tags

CCSS.1.OA.B.3

6+8=14, so

• 6+8=14

• 14+6=8

• 8+6=14

• 7+7=14

Tags

CCSS.1.OA.B.3

7+9=16, so

• 16-9=7

• 9+7=16

• 9+9=16

• 7+9=16

Tags

CCSS.1.OA.B.3

8+1=9, so

• 1+8=9

• 9+1=10

• 1+1=2

• 8+8=16

Tags

CCSS.1.OA.B.3

10+9=19

• 9+10=19

• 19-10=9

• 10+9=19

• 9+9=18

Tags

CCSS.1.OA.B.3

12+5=17

• 5+5+10

• 5+12=17

• 17-5=12

• 12+12=24

Tags

CCSS.1.OA.B.3

According to the commutative property of addition, 2 + 5 equals:

• 6 + 1

• 3 + 4

• 5 + 2

• 4 + 3

Tags

CCSS.1.OA.B.3

According to the commutative property of addition, 3 + 4 + 6 equals:

• (3 + 4) + (3 + 6)

• (3 + 4) x (3 + 6)

• 4 + 5 + 7

• 6 + 3 + 4

Tags

CCSS.1.OA.B.3

Which property has the addends switched around?

• identity
• commutative
• associative
• none of them

Tags

CCSS.6.EE.A.3