2nd Grade Adding Within 100 Worksheet (PDF)
This add within 100 worksheet for 2nd Grade covers adding within 100 (Common Core 2.NBT.B.5, 2.NBT.B.6), with a free PDF to print.
These 22 problems practice adding within 100 with place value, regrouping, and number lines (2.NBT.B.5 and 2.NBT.B.6). You will add two two-digit numbers, and then add three or four two-digit numbers.
The last six problems are word problems. Line up tens and ones, and check each answer by estimating.
Grade 2 · Common Core State Standards: 2.NBT.B.5, 2.NBT.B.6
Add within 100 worksheet: exercises 1 to 10
Exercise 1 – Add tens
Find \(30 + 40\).
Exercise 2 – Blocks without regrouping
Find the sum shown by the blocks.
Exercise 3 – Tens and ones
Find \(52 + 36\).
Exercise 4 – Add a group of tens
Find \(63 + 30\).
Exercise 5 – Add a one-digit number
Find \(47 + 6\).
Exercise 6 – First regrouping
Find \(28 + 15\).
Exercise 7 – Regroup the ones
Find \(36 + 27\).
Exercise 8 – Bigger regrouping
Find \(49 + 34\).
Exercise 9 – Jumps on a number line
Find \(57 + 25\). Use hops of tens and ones.
Exercise 10 – Sum near ninety
Find \(68 + 19\).
Exercises 11 and up
Exercise 11 – Sum over ninety
Find \(74 + 18\).
Exercise 12 – Compare two sums
Which sum is greater: \(46 + 27\) or \(39 + 36\)?
Exercise 13 – Missing digit
Find the missing digit: \(4? + 37 = 81\).
Exercise 14 – Break apart
Fill in the blanks: \(54 + 20 = ?\), then \(? + 9 = ?\). What is \(54 + 29\)?
Exercise 15 – Three addends
Find \(12 + 25 + 31\).
Exercise 16 – Four addends
Find \(21 + 34 + 17 + 26\).
Exercise 17 – Farmers market apples
Ana sold 47 apples on Saturday and 38 apples on Sunday. How many apples did she sell in all?
Exercise 18 – Library cart
A cart holds 29 picture books and 36 chapter books. How many books are on the cart?
Exercise 19 – Little League runs
A Little League team scored 24 runs in May, 18 runs in June, and 31 runs in July. How many runs did the team score in all?
Exercise 20 – Bake sale tables
Four tables at a bake sale hold 15, 22, 18, and 26 muffins. How many muffins are there in all?
Exercise 21 – Sticker collection
Sofia has 56 stickers. Her friend gives her 27 more. Later she buys a pack of 9 stickers. How many stickers does Sofia have now?
Exercise 22 – Can drive
A class wants to collect 100 cans. Mei brings 48 cans, Diego brings 35 cans, and Priya brings 17 cans. Do they reach 100 cans? Explain.
Key facts behind this add within 100 worksheet
- Add ones first, then tens.
- Ten ones can be regrouped as 1 ten: \(8 + 7 = 15\) is 1 ten and 5 ones.
- On a number line, hop by tens and then by ones.
- To add three or four numbers, add all the ones, then all the tens.
- Estimating with tens helps you check an answer.
How to use this add within 100 worksheet
Work through the exercises in order: they go from simple to challenging. Write every step on paper, then compare with the solutions page and redo any exercise you missed the next day.
All Grade 2 chapters: Grade 2 math.
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