Let’s Workout Our Brain Add Subtract Within 20 Activity
This Let’s Workout Our Brain Add Subtract Within 20 activity gives 1st-2nd grade students two mental math card games, a score sheet and a practice page, with an answer key included.
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About this resource
Description
Strong math facts help children solve bigger problems with ease. This Let’s Workout Our Brain Add Subtract Within 20 activity gives 1st and 2nd grade students a fun way to practice adding and subtracting within 20 using mental math.
In Let’s Workout Our Brain!, children play two quick card games with 20 dumbbell Number Cards. In Make 20, a player flips a card and races to say the number that makes 20 with it. In Take Away, two players each flip a card and subtract the smaller number from the bigger one. Students record their facts on the Brain Gym Score Sheet. Print the cards one-sided and make a few straight cuts on the dashed lines. A 2nd grade practice page gives ten new problems where students find the missing number in addition and subtraction facts.
What’s Included
- A colorful cover page
- A How to Use page with rules for both games
- 20 dumbbell Number Cards from 1 to 20
- A Brain Gym Score Sheet
- A 2nd grade practice worksheet: find the missing number
- A Make 20 card answer key and a practice answer key
Why This Activity Helps Kids
- Fast, friendly games build fact fluency within 20 without timed tests.
- Finding the number that makes 20 helps children see how addition and subtraction are connected.
- Saying answers out loud keeps every player thinking during each turn.
Ideas for Teachers and Parents
Use this 1st grade addition activity as a warm-up, at a math center or as a partner game at home. Start with Make 10 using cards 1 to 10, then move up to Make 20. Have children explain the fact they used, like 7 + 3 = 10, so 17 + 3 = 20. Come back to this Let’s Workout Our Brain Add Subtract Within 20 activity whenever students need a quick brain workout.
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