# Subtraction Fact Warm Up

Here is a math warm up for subtraction. It can also be used as a lesson introduction or mini math workshop! Students will understand that from any 2 numbers, 2 subtraction stories (or facts) can be created. You just need:
• counters in 2 colors
• a dish
• dominos

Model several first, talking about what you are doing and building an understanding of the key concepts.

Students then:
• take a domino
• tell the 2 numbers - here we have 5 and 2
• total the domino - 5 and 2 makes 7 altogether
• build the numbers with counters (this is important)

• use a dish (or piece of paper or their hand) to conceal one number
• talk about what has happened
• 7 take away 5 leaves 2

• conceal the other number and again, talk about the subtraction - 7 take away 2 leaves 5

One of the games in our Subtraction Problem math pack will help students build a deeper understanding of related subtraction facts. It is called In and Out and each activity card shows fish in and out of the ocean!

Students can
• describe the subtraction story
• model it with counters on the card
• perform the subtraction (moving counters off the card)
• record it in numbers (directly on the card or on a whiteboard/paper)
Find the pack (which also includes activities to scaffold this concept) over in our store!

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