Add with Base-Ten Blocks
Count the tens and ones in both groups. 10 ones make 1 more ten.
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This is sheet #40324601.
How to do it
- Count the tens and ones in the first group.
- Count the tens and ones in the second group.
- Put them together. 10 ones make 1 more ten.
Teaching tip
Real blocks, or bundles of 10 straws, make this page much easier the first time. This sheet is aligned with Common Core 2.NBT.B.5.
About this worksheet
Two-digit addition shown with ten rods and one cubes, so kids can see a new ten being made.
What kids practice
Adding and subtracting two-digit numbers, like 47 + 25 and 63 - 28. The ones are added or subtracted first, then the tens. When the ones add up to 10 or more, 10 of them become 1 ten (carrying). When there aren't enough ones to take away, 1 ten becomes 10 ones (regrouping). Every problem in this topic uses two-digit numbers on both lines.
Watch for
- Writing 12 in the ones place instead of carrying the 1 ten.
- Subtracting the smaller digit from the bigger one in the ones (63 - 28 becomes 45).
- Forgetting to take 1 away from the tens after regrouping.
- Adding when the sign says subtract on the mixed page.
It's free to print, with Fewer, Standard or More on the page and an answer key. See the full adding and subtracting within 100 guide for 2nd grade.
More sheets in this set
- See it all
1. Carry and Regroup ChartOne worked example of carrying in addition and one of regrouping in subtraction, step by step. 
3. Jump on a Number LineAdd a two-digit number by jumping the tens, then the ones, on an open number line.
4. Add Two-Digit NumbersTwo-digit addition on graph paper where the ones never add up to 10 or more.
5. Add with RegroupingTwo-digit addition on graph paper where every problem needs a carried ten.
6. Subtract Two-Digit NumbersTwo-digit subtraction on graph paper where the top ones digit is always big enough.
7. Subtract with RegroupingTwo-digit subtraction on graph paper where every problem needs regrouping, with a row on top for the new numbers.
8. Add or Subtract?Two-digit addition and subtraction mixed on one page, some with regrouping and some without.