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Addition · Grade 2

2 Digit Addition Worksheets With Regrouping

Regrouping gives ten ones a new place without changing their value. Use a tens-and-ones example, then practise two-digit addition with a carry from the ones column. Every total is 100 or less.

15 problemsAnswer key includedFree printableA4 & US Letter
Generate & printSee the worked example

Where does the extra ten come from?

Eli collects 36 game tokens and his sister brings 27 more. He combines the loose tokens first: 6 ones and 7 ones make 13 ones. He pauses because he cannot put the two digits of 13 into the one space for ones.

36: 3 tens and 6 ones.

27: 2 tens and 7 ones.

6 + 7 = 13 ones
13 ones = 1 ten + 3 ones
3 tens + 2 tens + 1 ten = 6 tens
36 + 27 = 63

Bundle ten of the loose tokens together. There are now three loose tokens and one new bundle of ten. Nothing has been added or taken away: thirteen ones and one ten plus three ones are two ways to show the same amount.

Connect the exchange to a carry mark

  1. Line up the two numbers so the ones are under the ones.
  2. Add the ones. Six plus seven makes thirteen.
  3. Write 3 in the ones position and mark the new ten above the tens column.
  4. Add all the tens: the original three, the original two, and the new one. Write 6 in the tens position.

The small 1 above the tens column means one ten, not one more single token. Saying “one new ten” makes the carry mark easier to understand than memorizing “write one up there.” A quick drawing of bundles and dots can show where that ten came from.

If the child writes 53: the ones may be correct, but the new ten has not been included. Ask them to count all six bundles, including the one made from the loose tokens. The total should be ten more than 53.

What if the total is exactly 100?

In 68 + 32, eight ones and two ones make a new ten with no ones left. Six tens, three tens, and the new ten make ten tens. Ten tens are one hundred, so the answer is 100. Both zero digits matter: there are no leftover tens or ones.

Choose practice that fits the next step

Every problem in this set requires exchanging ones for a ten. The operands have two digits and the totals do not exceed 100. If aligning place values is still difficult, try the linked set without regrouping first. Children may also use a number line or split a number into tens and ones; the written method is one way to record the same reasoning.

Make a practice set

Choose what to print. Selecting both shows the answer key on screen and prints the questions followed by the answers.

Print materials

After the practice

Ask the child to point to the new ten in one completed problem and explain its value. Check a result by subtracting one addend from the total. The answer key shows final totals; it does not judge a particular mental or written strategy.

More about addition · Grade 2 worksheets

Grade 2 selected skill connection: 2.NBT.B.5. See the Common Core grade guidance. This worksheet does not cover every requirement in the standard.