Lesson 25 How Do You Want to Subtract?

• Let’s use subtraction methods that work for the numbers in a problem.

Warm-up Choral Count: Start At 50

What patterns do you see?

Activity 1 Choose Your Own Subtraction Method

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

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

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

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

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

Activity 2 Solve Story Problems

1. There are 12 pencils on the table.
The teacher picks up 7 pencils.
How many pencils are still on the table?
Show your thinking using drawings, numbers, or words.

Equation:

2. Clare collects 8 glue sticks from the red table.
She collects some more from the blue table.
Now she has 15 glue sticks.
How many did she collect from the blue table?
Show your thinking using drawings, numbers, or words.

Equation:

3. Kiran has 17 crayons.
He gives some to his friends.
Now he has 9 crayons.
How many did he give to his friends?
Show your thinking using drawings, numbers, or words.

Equation:

Problem 1

Find the number that makes each equation true.