1.OA.4 Common Core Worksheet
This 1.OA.4 common core worksheet gives 1st grade students three fact families and the four related addition and subtraction facts in each, plus an answer key, so subtraction starts to feel like addition read backwards.
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About this resource
Description
This 1.OA.4 common core worksheet gives first graders focused practice with fact families — the small group of numbers that make one addition sentence and its two subtraction sentences all at once. Standard 1.OA.4 asks students to understand subtraction as an unknown-addend problem, and a fact family is the clearest picture of that idea: if a child knows that 4 and 9 make 13, then 13 minus 4 is not a new problem to solve, it is the same fact read backwards.
The page holds three families, each in its own card. Every card shows the two addition facts on the left and the two subtraction facts on the right, so the pattern sits side by side where a child can see it. Answers go in a printed box after each equal sign, which keeps the work tidy and gives every response the same amount of room. After finishing a card, students should be able to say the three numbers of that family out loud.
What’s Included
- One printable worksheet page with three fact families
- Four related equations per family — two addition, two subtraction
- A printed answer box after every equal sign
- A full answer key on the final page
Three Reasons This Helps Kids
- It halves the memorizing. A child who owns one fact family owns four facts, because the same three numbers make all of them.
- It builds the unknown-addend habit. Reading 13 − 4 as “what goes with 4 to make 13” is exactly the thinking standard 1.OA.4 is after.
- It sets up regrouping. Students who can move between adding and subtracting fluently have a far easier time with two-digit work later.
Ideas for Teachers and Parents
- Cover the first card and ask a child to rebuild all four facts from just the three numbers.
- Use counters or a number line to act out one family, then write the four equations together.
- Turn the page into a partner game: one student says a subtraction fact, the other says the addition fact that answers it.
- Pair this 1st grade fact families worksheet with a blank card and let students invent a fourth family of their own.
Print the 1.oa.4 common core worksheet for morning work, math centers, homework, or a quick standards check before a unit test. The answer key on the final page makes it easy to check the work in seconds.
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