Addition Houses (Number Houses)
Updated October 2026 · 9 free printables
Number house worksheets for kindergarten to 2nd grade. The roof shows a number, and the two windows on every floor add up to it, so a house for 7 holds 0 + 7, 1 + 6, 2 + 5 and so on. Kids write the missing number on each floor of houses for 5 to 10 and for numbers up to 20.
Other pages turn the idea around: subtraction houses that take away from the roof number, a street of houses with missing roof numbers, houses with one wrong floor to find and fix, three-room houses that add three numbers, and plain houses to color once every window is filled in. Answer keys included.
All 9 Addition Houses (Number Houses), One by One
Here is a closer look at every page in this collection: what it practices, which grade it fits and a tip for each one.
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1. Number Houses for 5, 6 and 7
A free printable number houses for 5, 6 and 7 worksheet with an answer key. Every floor of a house adds up to the number on its roof. Write the missing number in each window. Big pictures and only a few tasks per page make it a gentle start for kindergartners. Use counters split into two piles to check a tricky bond.
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2. Finish and Color the Number Houses
A free printable finish and color the number houses worksheet with an answer key. Fill in every window so each floor adds up to the roof number. When a house is finished, color it. It suits ages 4 to 6, and little ones can count the pictures with a finger. Say each bond out loud: 6 and 4 make 10.
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3. Number Houses for 8 and 9
A free printable number houses for 8 and 9 worksheet with an answer key. The two windows on each floor add up to the roof number. Fill in the empty windows. It matches first grade goals, roughly ages 6 to 7. Use counters split into two piles to check a tricky bond.
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4. Make 10 Addition Houses
A free printable make 10 addition houses worksheet with an answer key. Both houses hold all the ways to make 10, but the floors are mixed up. Fill in every empty window. First graders can do it on their own once they know the strategy at the top of the page. Say each bond out loud: 6 and 4 make 10.
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5. Subtraction Houses: Take Away From the Roof
A free printable subtraction houses: take away from the roof worksheet with an answer key. Start with the roof number. Take away the first number to find what is left, or find how many were taken away. First graders can do it on their own once they know the strategy at the top of the page. Check each answer by adding it back to the number taken away.
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6. Addition Houses for Numbers 11 to 20
A free printable addition houses for numbers 11 to 20 worksheet with an answer key. Each floor adds up to the roof number. Find the missing number on every floor. Second graders usually finish it in 10 to 15 minutes. Say each bond out loud: 6 and 4 make 10.
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7. Number House Street: Roofs and Windows
A free printable number house street: roofs and windows worksheet with an answer key. Fill in the empty windows. Two houses lost their roof number: use the full floor to find it. It fits second grade, around ages 7 to 8. Use counters split into two piles to check a tricky bond.
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8. Find the Wrong Floor in Each Number House
A free printable find the wrong floor in each number house worksheet with an answer key. One floor in each house does not add up to the roof number. Circle it, then fix it below the house. Second graders usually finish it in 10 to 15 minutes. Say each bond out loud: 6 and 4 make 10.
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9. Three-Room Number Houses
A free printable three-room number houses worksheet with an answer key. Each floor has three rooms that add up to the roof number. Find the missing number. It fits second grade, around ages 7 to 8. Use small objects like buttons or cereal to check tricky problems.
Tips for addition houses (number houses)
- Fill the floors in order (0, 1, 2 ...) and watch one number go up while the other goes down.
- Use fingers or 10 counters: split them into two groups for each floor of the house.
- Check a finished floor by adding the two windows; the sum must match the roof every time.
Fun math facts
- A house for 10 has 11 floors, because 0 + 10 and 10 + 0 both count.
- Any number has one more pair of parts than the number itself, so the house for 20 could have 21 floors.
- In many countries number houses are one of the first pictures children see in their first-grade math book.
Fun ways to use your printables
- Draw a big number house on the sidewalk with chalk and let kids hop to the floor that matches your call.
- Build a house for 6 with LEGO bricks: each floor uses 6 bricks in two colors.
- Hang a family number house on the fridge and add a new floor every time someone finds a pair.
How to print
Click Download PDF and print at 100% on US Letter or A4 paper. Page 1 is the worksheet and page 2 is the answer key, so choose “page 1” in the print dialog if you only want the practice page. Every worksheet is free for home, homeschool and classroom use, so print as many copies as you need.
Frequently asked questions
What is a number house?
A drawing of a house with a number on the roof. Each floor has two numbers that add up to the roof number. It shows all the ways to split a number, which teachers also call number bonds or the parts of a number.
Why should kids learn every pair for 10?
Knowing the pairs that make 10 by heart is the base of mental math. Kids use them to add 8 + 5 (8 + 2 + 3) and to subtract across ten later on.
How do subtraction houses work?
The roof number is the whole. If you take away the number in the first window, the second window shows what is left. Kids see that 9 - 4 = 5 and 4 + 5 = 9 live on the same floor.
What grade are addition houses for?
Houses for 5 to 7 suit kindergarten, houses for 8, 9 and 10 fit 1st grade, and the houses for 11 to 20, the street and the three-room houses are good 2nd grade practice.