MathPrepAI
Sign up

Adding Three Numbers

Name: ______________Date: _______
1)12 + 8 + 5 = ?
2)7 + 9 + 6 = ?
3)20 + 15 + 10 = ?
4)4 + 8 + 13 = ?
5)11 + 11 + 11 = ?
6)6 + 14 + 9 = ?

mathprepai.com

Free — no sign-up to preview

1st & 2nd Grade

Adding Three Numbers

Add three single- and double-digit numbers in one expression.

Grade
1st & 2nd Grade
Common Core
1.OA.A.2
Topic
Addition Worksheets
Format
PDF · A4 / Letter
Make & download PDFSee all in this topic →

Sample problems

  1. 1.12 + 8 + 5 = ?
  2. 2.7 + 9 + 6 = ?
  3. 3.20 + 15 + 10 = ?
  4. 4.4 + 8 + 13 = ?
  5. 5.11 + 11 + 11 = ?
  6. 6.6 + 14 + 9 = ?
Answer key
  1. 1.25
  2. 2.22
  3. 3.45
  4. 4.25
  5. 5.33
  6. 6.29

About this Adding Three Numbers worksheet

This adding three numbers worksheet is aimed at 1st & 2nd Grade students and is generated by MathPrepAI's algorithmic engine — so you can produce unlimited fresh versions with automatic answer keys. Adjust the number of problems, difficulty, and page layout, then download a print-ready PDF. It aligns with Common Core standard 1.OA.A.2.

Browse more by grade: Grade 1, Grade 2.

Related worksheets

Addition Within 10

Name: ______________Date: _______
1)
3
+ 2
2)
4
+ 3
3)
5
+ 4
4)
6
+ 5
5)
1
+ 1
6)
2
+ 2

mathprepai.com

Addition Within 10

Kindergarten & 1st Grade

Addition Within 20

Name: ______________Date: _______
1)
12
+ 8
2)
12
+ 3
3)
12
+ 6
4)
12
+ 1
5)
12
+ 4
6)
12
+ 7

mathprepai.com

Addition Within 20

1st & 2nd Grade

2-Digit Addition (No Regrouping)

Name: ______________Date: _______
1)
33
+ 28
2)
46
+ 9
3)
19
+ 20
4)
32
+ 1
5)
45
+ 12
6)
18
+ 23

mathprepai.com

2-Digit Addition (No Regrouping)

1st & 2nd Grade

2-Digit Addition With Regrouping

Name: ______________Date: _______
1)
32
+ 34
2)
45
+ 45
3)
58
+ 6
4)
71
+ 17
5)
24
+ 28
6)
37
+ 39

mathprepai.com

2-Digit Addition With Regrouping

2nd Grade