K.4 Understanding Addition and Subtraction

 

 

Count out 4 counters.
Add 1 more.

Count out 6 counters.
Add 1 more.

Count out 8 counters.
Add 1 more.

Count out 8 counters.
Take away 2 counters.

Count out 6 counters.
Take away 2 counters.

Count out 4 counters.
Take away 2 counters.

Start with a full 5-frame.

Player 1 rolls a cube on the number mat and takes away or adds that number of counters while player 2 is not looking.

Then player 2 figures out what player 1 did.

Players take turns switching roles.

Roll a cube onto a number mat.
Count out that number of counters.

Roll a cube again onto the number mat.
Count out that number of counters.
How many counters do you have in all?

Pick a number from the list to put in the blank space.

Then try the problem you made.

Count out 8 counters.

Take away \(\underline{\hspace{1 cm}}\) counters.

How many counters are left?

After you try the problem you made, try it again with a different number in the blank space.

Do you think your answer will be the same or different?
Explain.

Tell your partner a story using the picture.

Show what happens in the story with counters.

There are 5 snails crawling in the grass.
Then 3 snails came to join them.
Then 2 of the snails crawled away.

Jada has 5 connecting cubes.

Han gives Jada 2 more connecting cubes.

How many connecting cubes does Jada have now?

There were 8 cars in the parking lot.

All 8 of the cars left after school.

How many cars are in the parking lot now?

There were 9 crabs on the beach.

Then 5 of them scurried away into the ocean.

How many crabs are on the beach now?

Circle the representation that matches the story.

There are 4 cups of milk on the table.

Jada puts 2 more cups of milk on the table.

How many cups are on the table altogether?

Make a drawing to show the story.

There are 7 crows in the tree.

Then 3 more crows fly into the tree.

How many crows are in the tree altogether?

Show your thinking using drawings, numbers, words, or objects.

There are 6 dolphins swimming around the boat.

Complete the story in two different ways.

Solve your problems or share with a partner and solve your partner's problems.

Tell a story problem that goes with each drawing.

1.  

   

   

2.  

   

   

These three story problems are not finished yet.
Finish the story problems with your own questions.
Then solve the story problems you made.

1. Noah had 4 erasers.
   Clare gave him 3 erasers.

2. Tyler had 3 pencils.
   Tyler found 2 more pencils.

3. Elena had 6 markers.
   She lost 1 of her markers.

There are 5 red apples in the bowl.
Lin puts 3 green apples in the bowl. 

How many apples are in the bowl?

Circle the expression that matches the story problem.

Draw a line from each expression to the matching drawing.

Find the value of each expression.
Show your thinking using objects, drawings, numbers, or words.

Find the value of each expression.
Show your thinking using objects, drawings, numbers, or words.

Circle the expression that shows 8. 

What other expressions can you find that show 8?

Tell a story that this picture might represent.