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MATH MISSIONS • VERTICAL ADDITION

Build Each Sum One Digit at a Time.

Practice vertical addition with two-digit, three-digit, and four-digit numbers. Drag the correct digits into the answer boxes and complete each addition problem in column form.

Grades 2–4 3 grade levels 10 rounds Drag & drop Instant feedback
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Play again & again!

Every new game creates a fresh set of addition problems, answer tiles, and regrouping patterns for extra practice.

Choose a grade level

Grade labels are a guide. Choose the number size that matches the learner’s current skills.

QUICK GUIDE

How Does Vertical Addition Work?

Write numbers in columns so the ones, tens, and hundreds line up. Add from right to left. When a column makes 10 or more, regroup by carrying the extra ten into the next column.

1 ↕
Line Up Place Values

Put ones under ones, tens under tens, and hundreds under hundreds.

→
2 +
Add Right to Left

Start with the ones column, then move to tens and hundreds.

→
3 10+
Regroup When Needed

If a column totals 10 or more, write the ones digit and carry 1 to the next column.

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Remember: the carried 1 represents one group of ten. Add it to the next column before finding that column’s total.

REGROUPING EXAMPLE
1 1
268
+157
425
1
Ones: 8 + 7 = 15. Write 5 and carry 1 ten.
2
Tens: 1 + 6 + 5 = 12. Write 2 and carry 1 hundred.
3
Hundreds: 1 + 2 + 1 = 4. The final answer is 425.

In this game, students build each sum one digit at a time. The visual column layout helps reinforce place value while regrouping practice shows exactly when a new ten or hundred needs to be carried.