Special October offer
- 7 days free unlimited access to all premium content
Try Premium
All
Worksheets
Interactive
Quizzes
Workbooks
Coloring
Games
Learning
Home
Third Grade
Three-digit Mental Addition
Third Grade
Three-digit Mental Addition
Filter by Grade:
3rd grade
Filter by Subject:
Number Sense
Addition
Two-digit Mental Addition
Two-digit Addition
Adding Tens
Three-digit Addition Without Regrouping
Three-digit Addition With Regrouping
Three-digit Addition
Multi-digit Addition Without Regrouping
Multi-digit Addition With Regrouping
Multi-digit Addition
Addition Word Problems
Subtraction
Multiplication
Division
Mixed Operations
Fractions
Decimal Fractions and Numbers
Geometry
Algebra
Time
Measurement
Learning Resources
Coloring Activities
Math Games
Seasonal
Word Problems
Grades
Topics
Third Grade
Three-digit Mental Addition
7 Filtered Results
NEW!
NEW!
Test Prep
Create your own learning path
Get ready for an upcoming test
Step by Step practice
Let's start
Interactive
Three-digit numbers – Arithmetic sequences – Worksheet No.2
Interactive
Three-digit numbers – Arithmetic sequences – Worksheet No.3
Interactive
Three-digit addition No.1
Interactive
Three-digit addition No.4
Interactive
Mental 3 digit addition No.1
Adding numbers up to 1000 - Complete practice Pack
Interactive
Three-digit numbers – Arithmetic sequences – Worksheet No.5
Three-digit Mental Addition
For most people, mental calculations are the most commonly used in math. Practicing three-digit mental addition will provide your child with a solid basis going into higher math grades.