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Adding a 2-digit number and a 1-digit number (with carrying)
Name:
Date:
Find the sum.
1.
89
+
7
=
 
2.
53
+
6
=
 
3.
88
+
8
=
 
4.
25
+
6
+
7
=
 
5.
47
+
8
+
1
=
 
6.
47
+
8
=
 
7.
61
+
9
=
 
8.
40
+
8
=
 
9.
90
+
8
+
5
=
 
10.
28
+
7
=
 
11.
64
+
7
=
 
12.
96
+
6
+
8
=
 
13.
33
+
8
=
 
14.
37
+
6
=
 
15.
44
+
8
=
 
16.
39
+
9
=
 
17.
10
+
8
=
 
18.
22
+
8
=
 
19.
42
+
7
=
 
20.
14
+
8
=
 

Adding Two-Digit and One-Digit Numbers Worksheet (Horizontal Format)

This Grade 3 math worksheet focuses on adding a two-digit number with a one-digit number in a horizontal format, including problems that require carrying. This essential skill builds foundation for more complex addition and mental math skills.

Key Learning Points:

  • Understanding horizontal addition
  • Practicing carrying in addition
  • Adding two-digit numbers with one-digit numbers
  • Occasionally adding three numbers for an extra challenge
  • Building mental math skills

The worksheet includes 20 carefully crafted problems that provide practice with:

  • Adding numbers that require carrying (e.g., 21 + 9)
  • Adding numbers without carrying
  • Working with various two-digit numbers
  • Occasional three-number addition problems for extra challenge
  • Building confidence in mental addition skills

Regular practice with these horizontal addition problems helps students master the concept of carrying and prepares them for more advanced mental math techniques.