Addition Three 1-Digit Numbers
Adding Three 1-Digit Numbers: Learn
Adding three numbers (for example 5 + 8 + 7) involves two steps.
- Mentally add the first two numbers. (5 + 8 = 13).
- Add the other number to this sum. (13 + 7 = 20).
All together, 5 + 8 + 7 = 20.
Adding Three 1-Digit Numbers: Practice
What is the Sum of the three Numbers?
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Math Lessons by Grade
- Estimation and Mental Math
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- Percents and Ratios
- Place Value