PencilGoGrade 1 · Math · Operations
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Grade 1 Math Worksheet
Use the first fact to finish the second.
4 + 9 = 13. So 13 - 4 =
10 + 5 = 15. So 15 - 10 =
7 + 7 = 14. So 14 - 7 =
5 + 6 = 11. So 11 - 5 =
3 + 9 = 12. So 12 - 3 =
7 + 8 = 15. So 15 - 7 =
10 + 3 = 13. So 13 - 10 =
6 + 3 = 9. So 9 - 6 =
3 + 7 = 10. So 10 - 3 =
6 + 8 = 14. So 14 - 6 =
A fact family is a set of addition and subtraction facts that use the same three numbers. If 4 + 6 = 10, then 6 + 4 = 10, 10 - 4 = 6 and 10 - 6 = 4 are in the same family. Seeing that adding and subtracting undo each other is one of the biggest ideas in first-grade number work, and it is why a child who knows 4 + 6 can answer 10 - 6 without counting.
On this worksheet each line gives an addition fact and asks for a related subtraction, such as 4 + 6 = 10, so 10 - 4 = ____. Support sheets use totals to 10, standard sheets go to 15, and challenge sheets go to 20. Ask your child to say the whole family out loud before writing.
Common Core standard: 1.OA.B.3
4 + 6 = 10. So 10 - 4 = ____. The two parts are 4 and 6, so taking 4 away from 10 leaves 6. Write 6.
Writing the total of the addition fact, such as 10, instead of the other part.
The three numbers stay the same. What is left when you take one part away from the whole?
Writing the total of the addition fact, such as 10, instead of the other part.
The three numbers stay the same. What is left when you take one part away from the whole?
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Similar: Add and Subtract Word Problems · Three-Number Word Problems
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