Solve put together problems with both addends unknown

There are 9 penguins

Some penguins are inside the cave

Some penguins are outside the cave

Which equation shows the number of penguins in all?

• 9 = 5 + 5

• 9 = 4 + 5

• 9 = 4 + 4

• 9 = 3 + 5

There are 7 frogs

Some frogs are on a log

Some frogs are in the grass

Which equation shows the number of frogs in all?

• 7 = 5 + 1

• 7 = 4 + 3

• 7 = 3 + 5

• 7 = 2 + 4

6 = ...... + .......

• 5 + 1

• 5 +2

• 4 + 3

10 = ...... + .......

• 6+1

• 5+5

• 6+2

• 4+3

How can you make 7 ?

• 4 + 4

• 6 + 2

• 9 + 1

• 6 + 1

You have 9 hats. Some are blue. The rest are red. You have more red hats than blue hats. How many red and blue hats can you have?

• 4 red 5 blue

• 6 red 3 blue

• 2 red 7 blue