Adding by completing whole tens
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Free printable adding by completing whole tens worksheets for 2nd grade. Students use the make-a-ten strategy to add two numbers by first bridging to the next ten and then adding the remainder, developing efficient mental addition techniques. This approach helps students move beyond counting-on to more sophisticated addition strategies. Part of our addition worksheets collection.
What You'll Learn
- Add numbers by first bridging up to the next whole ten
- Break the second addend into parts to complete a ten first
- Apply the make-a-ten strategy to solve addition efficiently
FAQ
How does the completing-whole-tens strategy work step by step?⌄
To add 27 + 8, students note that 27 needs 3 to reach 30, split the 8 into 3 + 5, add 27 + 3 = 30, then add 30 + 5 = 35 — using the ten as a midpoint.
Why is the completing-whole-tens strategy considered more efficient than counting on?⌄
It leverages known decade-number facts and reduces the number of mental steps required, making it faster and less error-prone for numbers that span a ten boundary.
How can teachers introduce this strategy before students encounter it on worksheets?⌄
Use two-colored counters and a ten-frame to physically show splitting one addend into two parts — the amount needed to fill the frame and the leftover — before moving to abstract notation.
Ratings & Reviews
3Tom B.
Learning Specialist · Verified download
This will be a great addition. I already recommend ClassWeekly to all the families I work with.
Helpful · 10
Sarah K.
Kindergarten Teacher · Verified download
So excited for this to be ready! My students really need more practice with this topic.
Helpful · 11
Emily W.
Homeschool parent · Verified download
Excited for this one! I've been hunting for a good printable on this topic for weeks.
Helpful · 9
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