Addition · Grade 1

2 Digit Plus 1 Digit Addition Word Problems

Help your student add ones to a two-digit number using a strategy that fits.

4 problemsAnswer key includedPrintable worksheetA4 & US Letter

Create & print a worksheet Read the teaching notes

Teaching notes for parents and teachers

How to teach it

Try counting on for a small addition. When the total crosses a ten, show how some of the new ones complete that ten.

Example to work through together

Use the model below as you explain the example. Have your student point to the quantities as you discuss them.

28 counters, then 5 more

2 tens

8 starting ones

5 new ones

Regroup 10 ones as 1 ten

3 tens

3 ones

28 + 5 = 28 + 2 + 3 = 30 + 3 = 33

Use 2 of the 5 new counters to complete a ten. The other 3 stay as ones. The total amount stays the same when the counters are regrouped.

Ask your student

How many more ones are needed to reach the next ten?

If your student needs help

If the student loses track of the amount added, separate the added counters from the starting collection.

Choosing and using the worksheet

These four-problem sets use starting amounts from 10 to 90 and additions from 0 to 9. They include both regrouping and no-regrouping examples across sets, with totals from 10 to 99. They do not include a total of 100, two two-digit addends, or subtraction. Read the short stories aloud when reading would distract from the place-value reasoning.

Make a practice set

Select the worksheet, answer key, or both. When both are selected, the answer key prints after the questions. Keep it separate if you want your student to work independently.

Print materials

WorksheetAnswer keyPaper

After your student finishes

Ask whether the ones made a new ten. Check that the total increased by exactly the number of counters received, including cases where the increase is zero.

Calculation practice
2 Digit Addition With Regrouping
Exchange ten ones for a ten and keep the total within 100.
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Addition and Subtraction Word Problems Within 20
Read joining and taking-away stories, choose an equation, and answer in context.
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Adding and Subtracting Tens Word Problems
Combine or remove whole tens of counters. Explain the place value, including stories where zero counters change or remain.
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More about addition · Grade 1 worksheets

Grade 1 selected skill connection: Selected 1.NBT.C.4: add a one-digit number to a two-digit number, including composing a ten; starts 10–90 and addends 0–9. See the Common Core standards for this grade. This worksheet does not cover every requirement in the standard.