About this worksheet
Add whole numbers in columns, carrying when a column sums past 9.
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Counting reliably to at least 20.
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Place value for each digit — ones, tens, hundreds.
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The + symbol as combining two quantities.
With mastery, the student can
- Line up numbers by place value and add column by column from the right.
- Carry the tens digit when a column sum reaches 10 or more.
- Check a result by re-reading the carried digits in each column.