Ways to Subtract
Name two strategies that can help you subtract.
Make a ten, count back, count on to subtract, use addition to subtract, my way (picture, fingers).
What is a related addition fact to 9 + 5 = 14?
5 + 9 = 14
What is subtraction?
When you take away something.
9 - 4 = ?
5
Amy bakes 15 muffins. She gives 6 muffins to friends. How many muffins does Amy have left?
15 - 6 = 9
Which strategy won't help you solve 10 - 7?
Count to Subtract
Make 10
Think Addition
My Way
12 - 5 = 7
What is the other subtraction equation in this fact family?
12 - 7 = 5
What is addition?
When you add two groups together.
11 - 3 = ?
8
Ariana has some red balloons. She has 3 white balloons. Ariana has 12 balloons in all. How many red balloons does she have?
9 red balloons
Make a ten to solve 14 - 6.
14 - ? = 10
10 - ? = ?
14 - 6 = ?
14 - 4 = 10
10 - 2 = 8
14 - 6 =8
Which equation completes this fact family?
9 + 8 = 17
8 + 9 = 17
17 - 8 = 9
17 - 9 = 8
What is a doubles fact?
When you add two of the same number.
13 - 6 = ?
7
Bruce buys 11 cookies. He eats 4 cookies. There are 7 cookies left. Write an equation to match the story.
11 - 4 = 7
Use a number line to count back.
Solve 15 - 7 = ?
15 - 7 = 8
Which equation completes this fact family?
8 + 6 = 14
14 - 6 = 8
14 - 8 = 6
6 + 8 = 14
What makes up a fact family?
15 - 7 = ?
8
There are 16 m&m's. Alexis eats some m&m's. Now there are 8 m&m's. Write a subtraction equation to show how many m&m's are left.
16 - 8 = 8
Which addition facts will help you solve 12 - 9?
9 + 3 = 12
4 + 9 = 13
9 + 2 = 11
3 + 9 = 12
9 + 3 = 12
3 + 9 = 12
Which equation will help you solve...
5 + 8 = 13
13 - 5 = 8
13 - 6 = 7
13 - 9 = 4
8 - 5 = 3
What does it mean to make a ten to subtract?
17 - 5 = ?
12
Write a number story for 10 - 7.
Ex. Stacy has 10 stickers. She gives 7 to a friend. How many stickers does Stacy have left?