Subtracting 10 Using a Number Line Activity
This subtracting 10 using a number line activity helps 1st and 2nd grade students take away tens by hopping back on a number line. An answer key is included for easy checking.
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About this resource
Description
Once students can count by tens, they are ready to take tens away. This subtracting 10 using a number line activity shows young mathematicians how to subtract a multiple of ten from a multiple of ten by hopping back on a number line, one hop for each ten. Seeing the hops helps students understand why 70 minus 30 lands on 40, instead of just memorizing a fact.
Print the Task Cards on plain paper or cardstock, fold each sheet on the center line, and cut on the dashed lines. Each card shows a problem and a 0 to 100 number line. Students hop back by tens, record the problem and answer on the Number Line Log, and then flip the card over to see the hops and the answer for a quick self-check.
What’s Included
- A colorful cover and a How to Use page with simple steps
- 16 fold-over Task Cards with number lines
- A Number Line Log recording sheet
- A 1st grade practice worksheet with number lines
- Answer keys for the cards and the worksheet
Why It Helps Kids
First, the number line turns subtraction into a picture, so students can see how much is taken away. Second, hopping by tens builds strong place value sense and prepares students for mental math. Third, the self-check backs let students catch mistakes right away and build confidence as they work.
Ideas for Teachers and Parents
Use the cards in a math center, with a partner, or as a quick warm-up. Make a long number line with tape on the floor and let students hop the problems with their feet. Challenge early finishers to write their own subtraction problems. This 1st grade subtraction activity also works well for 2nd grade review, and the subtracting 10 using a number line activity is simple to use at home too.
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