About this worksheet
Add whole numbers in columns, carrying when a column sums past 9.
- Count reliably up to at least 20.
- Recognize digits 0–9 and know each digit's place value (ones, tens, hundreds).
- Understand the “+” symbol as combining two quantities.
With mastery, the student learns
- Line up numbers by place value and add column-by-column from right to left.
- Carry the tens digit when a column sum reaches 10 or more.
- Check a result by re-reading the carried digits in each column.