Addition Examples in Math

Start with the recap, study the fully worked examples, then use the practice problems to check your understanding of Addition.

This page combines explanation, solved examples, and follow-up practice so you can move from recognition to confident problem-solving in Math.

Concept Recap

The arithmetic operation of combining two or more numbers into a single total, representing joining or accumulating quantities.

Think of putting groups together—3 apples plus 2 apples gives 5 apples.

Read the full concept explanation →

How to Use These Examples

Read the first worked example with the solution open so the structure is clear.
Try the practice problems before revealing each solution.
Use the related concepts and background knowledge badges if you feel stuck.

What to Focus On

Core idea: Addition joins separate amounts into one combined count, lining up ones with ones and tens with tens.

Common stuck point: The procedure for addition is the easy part; the trap is adding digits without lining up place value. Asking "Am I joining amounts together to find how many there are in all?" first is what keeps a correct-looking calculation from being attached to the wrong concept.

Sense of Study hint: Ask: Am I joining amounts together to find how many there are in all?

Worked Examples

Example 1

easy

Sam has 3 apples. He gets 4 more apples. How many apples does Sam have now? Use

a + b = c

Answer

7 apples

First step

Write the addition sentence:

3 + 4 = ?

Full solution

2
Count on from 3: 4, 5, 6, 7.
3
So $3 + 4 = 7$ .

Addition means putting two groups together to find a total. We start with 3 and count on 4 more to reach 7.

Example 2

medium

A basket has 6 red balls and 5 blue balls. How many balls are there in all? Write the number sentence.

Example 3

easy

You have 1 cookie. Mom gives you 2 more. How many cookies?

Example 4

easy

3 fish in the bowl. 1 more fish goes in. How many fish?

Example 5

medium

You see 4 balloons. Dad ties 1 more. How many balloons?

Example 6

easy

Maya counted 7 birds in the tree. 2 more birds landed. How many birds are in the tree now?

Example 7

easy

Owen has 4 red crayons and 5 blue crayons. How many crayons does he have?

Example 8

medium

Noah has 2 toy trucks. Lily has 7 toy trucks. How many trucks do they have together?

Example 9

easy

There are 8 ants on a leaf. 5 more ants crawl onto the leaf. How many ants are on the leaf altogether?

Example 10

easy

Jack collected 8 baseball cards on Monday and 6 baseball cards on Tuesday. How many cards did he collect in all?

Example 11

hard

Theo has 9 marbles. He wins 7 more in one game, and then 4 more in the next. How many marbles does Theo have now?

Example 12

easy

A school library has 52 picture books on the bottom shelf and 39 picture books on the top shelf. How many picture books are on the two shelves in total?

Example 13

easy

Mia had \$15 in her piggy bank. Her grandma gave her \$22 for her birthday. How much money does Mia have now?

Example 14

hard

The class read 38 books in September and 47 books in October. The teacher's goal is for the class to read 100 books in those two months. Did the class meet the goal, and by how many books are they over or under?

Practice Problems

Try these problems on your own first, then open the solution to compare your method.

Example 1

easy

What is

4 + 3

Example 2

medium

There are 8 children on the playground. 7 more children come out. How many children are there now?

Example 3

easy

Compute

4 + 3

Example 4

easy

Compute

9 + 6

Example 5

easy

Compute

25 + 14

Example 6

easy

Compute

47 + 38

Example 7

easy

Compute

0 + 17

Example 8

easy

Compute

6 + 6 + 6

Example 9

easy

Compute

13 + 25 + 7

Example 10

easy

What number plus

12

equals

20

Example 11

medium

Compute

156 + 247

Example 12

medium

Compute

99 + 47

Example 13

medium

Compute

1{,}450 + 2{,}689

Example 14

medium

Estimate

498 + 305

to the nearest hundred.

Example 15

medium

Sarah has

\$23

. She earns

\$48

more. How much does she have now?

Example 16

medium

Compute

345 + 678 + 122

Example 17

medium

Compute

5{,}000 - 1{,}234 + 1{,}234

Example 18

medium

Mia has

74

stickers, Liam has

89

, and Zoe has

58

. How many in total?

Example 19

medium

A train started with

87

passengers. At Station A,

34

more got on. At Station B,

19

more got on. How many are on the train now?

Example 20

challenge

What is the sum of all whole numbers from

1

100

Example 21

challenge

Place the digits

1, 2, 3, 4, 5, 6

each exactly once to form two three-digit numbers whose sum is as small as possible. What is that sum?

Example 22

challenge

A

B

are different digits.

\overline{AB} + \overline{BA} = 99

. Find

A

and

B

Example 23

easy

You have 2 ducks. You see 1 more duck. How many ducks?

Example 24

easy

🍎🍎 and 🍎🍎. How many apples?

Example 25

easy

What is

2 + 2

Example 26

medium

You have 3 stickers. You get 2 more. How many stickers?

Example 27

hard

You have 2 red blocks and 2 blue blocks. How many blocks do you have?

Example 28

easy

Liam has 5 grapes. He gets 3 more. How many grapes does Liam have?

Example 29

easy

What is

6 + 4

Example 30

easy

What is

3 + 7

Example 31

medium

Ava has 6 cars. Ben has 3 cars. Who has more, and how many more?

Example 32

medium

There are 5 ducks in the pond. 5 more ducks swim over. How many ducks are in the pond?

Example 33

easy

Compute

7 + 7

Example 34

easy

Compute

6 + 7

Example 35

easy

Compute

9 + 4

Example 36

medium

Compute

13 + 6

Example 37

medium

Rosa read 7 pages before dinner and 8 pages after dinner. How many pages did Rosa read?

Example 38

easy

Compute

34 + 25

Example 39

easy

Compute

46 + 38

Example 40

easy

Compute

63 + 28

Example 41

medium

Compute

78 + 56

Example 42

medium

A bus left the station with 27 passengers. At the first stop, 16 more boarded. At the second stop, 9 more boarded. How many passengers are on the bus now?

← Back to Addition Formula Explained Practice Mode

Related Concepts

Counting Subtraction Multiplication

Background Knowledge

These ideas may be useful before you work through the harder examples.

counting