3-11-2020 Chapter 3 lesson 8 Add in any order

These addition sentences have the same addends:

1+5= 6 and 6+1= 7

• true

• false

These addition sentences have same addends

6+1= 7 and 1+6= 7

• true

• false

5+2 = 2+5

• true

• false

6

What is the missing number that we need to complete this equation?

3 + ____= 13

____ + 3 = 13

• 3

• 10

• 13

5 + 3 = 3 + (a)  

2 + 4 = (a)   + 2

6 + 5 = 5 + .....

• 8

• 6

• 10

7 + 3 = ..... + ......

• 3 + 7

• 1 + 8

• 1 + 7

• 2+ 7

4+8=8+3

• true

• false

9+2=2+9

• true

• false