1. Addition & Subtraction
Math Olympiad
Addition & Subtraction
1st Grade
Name: ___________________

2. Number Sense Fewer to More
Players
Count the number of baseball players.
There are _______ baseball players.
Count the number of baseball gloves.
There are ________ baseball gloves.
Count the number of baseball hats.
There are ________ baseball hats.
Gloves
Hats
Circle which item has the most items pictured above.
Players Gloves Hats

3. Number Sense Pictures & Numbers
Count the number of items in each set. Write the number on the line and create an addition sentence with the numbers.
There are
chef hats.
There are cowboy hats. + =
My number sentence would be:
There are total hats.

4. Number Sense Pictures & Numbers
Count the number of items in each set. Write the number on the line and create an addition sentence with the numbers.
There are
top hats.
There are birthday hats. + =
My number sentence would be:
There are total hats.

5. Number Sense Pictures & Numbers
Make a number sentence with the pictures below. = + + =

6. Number Sense Dominoes
Use the dominoes pictured to create number sentences.

7. Number Sense Pictures & Numbers
Make a number sentence with the pictures below. + = + =

8. Number Sense Greater than, Equal to, Less than
Think about Pac Man wanting to eat the larger number.
Use the symbols to write if the number on the left is greater than ( > ), equal to ( = ), or less than ( < ) the number on the right.
________ 8
10 ________ 10
11 ________ 12
12 ________ 12
25 ________ 30
100 ________ 45
30 ________ 40
15 ________ 12
55 ________ 56
4 ________ 5
19 ________ 20
22 ________ 66
100 ________ 101

9. Picture It!
Sam read 8 books. Tim read 1 more book than Sam. Lyn read 3 fewer books than Tim. How many books each did Tim and Lyn read?
Tim read _________ books.
Lyn read _________ books
Draw a picture to show what each child read.

10. Number Sense Missing Numbers
Write in the missing numbers.

11. Number Sense Word Problem
There are 5 puppies in the basket.
Max puts 3 more puppies in.
How many puppies are there in all?
What do you know?
There are _______ puppies in the basket.
Max puts _______ more puppies in the basket.
Write a number sentence to solve the problem.
_______ + _______ = _______ puppies in all

12. Number Sense Subtraction
Use the pictures below to solve the subtraction number sentences. (cross out the number of items subtracted ‘taken away’)
5 – 2 = _______
4 – 3 = _______
6 – 4 = _______

13. Number Sense Subtraction
Complete the subtraction sentence using the stories below. Draw a picture if needed.
There are 4 apples.
Matt eats 0.
How many are left?
_______ - _______ = _______

14. Number Sense Subtraction
Complete the subtraction sentence using the stories below. Draw a picture if needed.
There are 4 plums.
The children eat 4.
How many are left?
_______ - _______ = _______

15. Number Sense Subtraction
Complete the subtraction sentence using the stories below. Draw a picture if needed.
Lea has 6 bananas.
The monkey takes 3.
How many are left?
_______ - _______ = _______

16. Graphing Reading Bar Graphs

17. Number Sense Adding Machine
Make the In and Out machine work. Write the missing addend or sum.

18. Number Sense Adding Machine
Make the In and Out machine work. Write the missing addend or sum.
Create your own adding machine problem.

19. Number Sense Counting on Tens to Add
Use the hundreds chart and add.
Hundreds Chart

20. Number Sense Counting on Tens to Add
Use the hundreds chart and add.
Hundreds Chart

21. Number Sense Adding Two Digit Numbers with Regrouping
Add Two-Digit Numbers

22. Number Sense Finding the Sum
Add across. Add down. The sum is the same in both directions.

23. Number Sense Finding the Sum
Add across. Add down. The sum is the same in both directions.

24. Number Sense Adding Two Digit Numbers with Regrouping
Write the missing digit.

25. Problem Solving Too Much Information
Cross out any information that you do not need. Then solve.
In the park, 14 children play on the slides. 8 are boys and 6 are girls. 20 children play on the climbing tower. How many children play in the park?
Draw or write to explain.
_____________
children

26. Problem Solving Too Much Information
Cross out any information that you do not need. Then solve.
There are 12 children playing running games. 10 others play quiet board games. 3 teachers watch the children. How many children play?
Draw or write to explain.
_____________
children

27. Problem Solving Too Much Information
Cross out any information that you do not need. Then solve.
11 children choose raisins as a snack. There are about 30 raisins in each box. The other 9 children have juice. How many children have snacks?
Draw or write to explain.
_____________
children