Adding within 100 Chart
Add tens to tens and ones to ones.
Need more than one? Tap + for extra copies (up to 10).
How to do it
- Add tens to tens.
- Count on by tens.
- Make the next ten when the ones add up to 10 or more.
Teaching tip
Use a hundred chart: moving down a row is adding 10. This sheet is aligned with Common Core 1.NBT.C.4.
About this chart
Adding tens, adding tens to a number, making the next ten, and taking away tens.
What kids practice
In first grade, adding within 100 means problems like 40 + 30, 52 + 20 and 46 + 7. Kids use what they know about tens and ones. Tens go with tens and ones go with ones. When the ones add up to 10 or more, those ones make a new ten.
Watch for
- Adding the one-digit number to the tens, so 46 + 7 becomes 116.
- Forgetting to carry the new ten when the ones add up to 10 or more.
- Writing 7 instead of 70 for 40 + 30.
It's free to print, as many copies as you need. See the full adding within 100 guide for 1st grade.
More sheets in this set
2. Add TensAdding multiples of 10 like 30 + 40, with rod pictures to count.
3. Add Tens to a NumberAdding a multiple of 10 to a two-digit number, like 34 + 20, in a lined-up grid.
4. Two-Digit Plus One-DigitAdding a one-digit number to a two-digit number in a grid, sometimes making a new ten.
5. Take Away TensSubtracting multiples of 10, like 70 - 30, with rod pictures to cross out. Matches 1.NBT.C.6.