Add Three Numbers In Word Problems - 1st Grade Math

1. What is the total number of cookies if you eat $2$, your friend eats $3$, and your family eats $6$?

   $11$. Add all cookies eaten: $2 + 3 + 6 = 11$.

2. What number makes this true: $10 + 3 + \square = 18$?

   $5$. Since $10 + 3 = 13$, subtract from $18$: $18 - 13 = 5$.

3. What number makes this true: $\square + 7 + 7 = 20$?

   $6$. Since $7 + 7 = 14$, subtract from $20$: $20 - 14 = 6$.

4. What is the total number of pets: $3$ cats, $2$ dogs, and $4$ fish?

   $3 + 2 + 4 = 9$. Add all three types of pets to find the total.

5. What is the total: $6$ apples in a bowl, $5$ on a plate, and $2$ in a bag?

   $6 + 5 + 2 = 13$. Combine all three locations to get the total count.

6. What is the total: $5$ boys, $6$ girls, and $2$ teachers in a room?

   $5 + 6 + 2 = 13$. Add all three groups of people together.

7. What is the sum: $8$ books on a shelf, $2$ on a desk, and $3$ in a backpack?

   $8 + 2 + 3 = 13$. Combine books from all three places.

8. What is the total number of apples if you have $6$, your friend has $5$, and your sister has $3$?

   $14$. Add all three numbers: $6 + 5 + 3 = 14$.

9. What number makes the equation true: $9 + 4 + x = 20$?

   $x = 7$. Find the missing addend: $20 - 9 - 4 = 7$.

10. What is the sum: $10$ blocks in a tower, $3$ blocks on the table, and $2$ blocks in a bin?

    $10 + 3 + 2 = 15$. Combine blocks from all three places.

11. What is the total number of books if there are $5$ on the table, $5$ on the shelf, and $5$ in a box?

    $15$. Add books from all locations: $5 + 5 + 5 = 15$.

12. What number makes this true: $\square + 4 + 9 = 17$?

    $4$. Since $4 + 9 = 13$, subtract from $17$: $17 - 13 = 4$.

13. What number makes the equation true: $x + 6 + 6 = 15$?

    $x = 3$. Subtract known addends: $15 - 6 - 6 = 3$.

14. What number makes the equation true: $8 + x + 1 = 10$?

    $x = 1$. Find the missing number: $10 - 8 - 1 = 1$.

15. What is the sum: $9$ crayons in a box, $1$ on the floor, and $4$ in a cup?

    $9 + 1 + 4 = 14$. Add crayons from all three locations.

16. What number makes this true: $\square + 5 + 4 = 15$?

    $6$. Since $5 + 4 = 9$, subtract from $15$: $15 - 9 = 6$.

17. What is the total number of coins if you have $7$ pennies, $6$ nickels, and $2$ dimes?

    $15$. Add all coin types: $7 + 6 + 2 = 15$.

18. What is the sum in $8 + 1 + 9 = \square$?

    $18$. Add left to right: $8 + 1 = 9$, then $9 + 9 = 18$.

19. What is $x$: $3$ birds are on a tree, $7$ are on a fence, and $x$ are on the ground. There are $18$ birds total.

    $x = 8$. Find missing birds: $18 - 3 - 7 = 8$.

20. What is the total: $2$ shells on Monday, $7$ on Tuesday, and $6$ on Wednesday?

    $2 + 7 + 6 = 15$. Add shells collected on all three days.

21. What is the total number of stickers if you have $9$, your friend has $4$, and your brother has $2$?

    $15$. Add all stickers: $9 + 4 + 2 = 15$.

22. What is the sum of three numbers in the equation $4 + 7 + 2 = \square$?

    $13$. Add left to right: $4 + 7 = 11$, then $11 + 2 = 13$.

23. What number makes the equation true: $7 + x + 2 = 16$?

    $x = 7$. Subtract known values from total: $16 - 7 - 2 = 7$.

24. What is the total number of balloons if there are $2$ red, $6$ blue, and $7$ green balloons?

    $15$. Add all balloon colors: $2 + 6 + 7 = 15$.

25. What is the sum in $1 + 8 + 6 = \square$?

    $15$. Add left to right: $1 + 8 = 9$, then $9 + 6 = 15$.

26. What number makes this true: $2 + 9 + \square = 16$?

    $5$. Since $2 + 9 = 11$, subtract from $16$: $16 - 11 = 5$.

27. What equation matches: You have $4$ red balloons, $3$ blue, and $2$ green. How many balloons in all?

    $4 + 3 + 2 = 9$. Add all three groups together to find the total.

28. What is the total number of toys if there are $4$ cars, $3$ dolls, and $8$ blocks?

    $15$. Add all toy types: $4 + 3 + 8 = 15$.

29. What is the total: $1$ cookie in a jar, $8$ cookies on a plate, and $6$ cookies in a box?

    $1 + 8 + 6 = 15$. Add cookies from all three containers.

30. What is the sum: $7$ stickers on page $1$, $4$ on page $2$, and $1$ on page $3$?

    $7 + 4 + 1 = 12$. Add stickers from all three pages together.

31. Which equation matches: $2$ red cars, $6$ blue cars, and $x$ green cars make $11$ cars total?

    $2 + 6 + x = 11$. Sets up equation to find the unknown green cars.

32. What number makes this true: $6 + 6 + \square = 20$?

    $8$. Since $6 + 6 = 12$, subtract from $20$: $20 - 12 = 8$.

33. What equation matches: There are $14$ marbles total. You have $6$ and $5$. How many more marbles, $x$, are there?

    $6 + 5 + x = 14$. Shows the equation for finding the missing marbles.

34. What number makes this true: $3 + \square + 8 = 20$?

    $9$. Since $3 + 8 = 11$, subtract from $20$: $20 - 11 = 9$.

35. What number makes this true: $\square + 2 + 3 = 12$?

    $7$. Since $2 + 3 = 5$, subtract from $12$: $12 - 5 = 7$.

36. What is the sum in $9 + 9 + 2 = \square$?

    $20$. Add left to right: $9 + 9 = 18$, then $18 + 2 = 20$.

37. What is $x$: $6$ kids are on swings, $4$ are on slides, and $x$ are on the sandbox. There are $15$ kids total.

    $x = 5$. Subtract known groups from total: $15 - 6 - 4 = 5$.

38. What number makes this true: $5 + \square + 5 = 19$?

    $9$. Since $5 + 5 = 10$, subtract from $19$: $19 - 10 = 9$.

39. What is $x$: $5$ pencils are sharp, $2$ are broken, and $x$ are new. There are $12$ pencils total.

    $x = 5$. Subtract known pencils: $12 - 5 - 2 = 5$.

40. What number makes the equation true: $x + 5 + 3 = 12$?

    $x = 4$. Subtract the known addends from the sum: $12 - 5 - 3 = 4$.

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