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About this skill
Column addition with three-digit numbers
Practice adding two three-digit numbers in columns. Each question requires regrouping once, either from ones to tens or from tens to hundreds.
Add from right to left. Write the last digit of each column sum below that column and carry the tens to the next column.
At each step, enter the digit of the sum and any carried digit. Choose the session length and time allowed per question. Select “Show answer” to see the complete solution.