Math Worksheet for Students | Practice Essential Math Skills

Instructions

1. Complete each section in order.
2. Use a pencil, counters, or small objects to help you count.
3. Check your work by counting again or using a different strategy.
4. Try the Challenge questions when you are ready.

1. Count to 20

A. Write the missing numbers.

1, 2, , 4, 5, , 7, 8, , 10
11, , 13, 14, , 16, 17, , 19, ___

B. Write the number that comes before and after.

2. Show the Number

Draw dots, circles, or simple objects to show each number.

• 6: __

• 12: _____

• 17: _____

• 20: _____

Hint: You can organize objects in groups of 5 or 10 to make counting easier.

3. Number Representations

Complete the organizer. Each row should show the same number in three different ways.

4. Compare Numbers

Write <, >, or = in each box.

1. 5 ___ 9
2. 13 ___ 13
3. 18 ___ 12
4. 7 ___ 15
5. 20 ___ 19
6. 10 ___ 10

Explain one answer:
I know that __ is greater than, less than, or equal to __ because ____.

5. Add Within 20

Solve each problem. You may draw a picture or use counters.

1. 3 + 4 = __
2. 6 + 2 = __
3. 5 + 5 = __
4. 8 + 6 = __
5. 9 + 7 = __
6. 10 + 10 = __

Helpful strategy: Start with the larger number and count on.

6. Subtract Within 20

Solve each problem.

1. 7 − 3 = __
2. 10 − 4 = __
3. 12 − 2 = __
4. 15 − 6 = __
5. 18 − 9 = __
6. 20 − 5 = __

7. Real-World Math Mission

A class is preparing a snack table.

1. There are 8 apples and 6 oranges. How many pieces of fruit are there altogether?

   Number sentence: __

   Answer: __ pieces of fruit

2. The class has 20 cups. They use 7 cups. How many cups are left?

   Number sentence: __

   Answer: __ cups

3. There are 9 students at one table and 9 students at another table. How many students are there altogether?

   Number sentence: __

   Answer: __ students

4. Write your own story problem with an answer of 20.

   ---

   ---

   Number sentence: __

8. Sort and Explain

Sort these numbers into the correct group: 3, 8, 10, 13, 16, 19, 20

How can you tell whether a number is even?

9. Number Line Activity

Use the number line to answer the questions.

0 — 1 — 2 — 3 — 4 — 5 — 6 — 7 — 8 — 9 — 10 — 11 — 12 — 13 — 14 — 15 — 16 — 17 — 18 — 19 — 20

1. Start at 6 and move forward 4 spaces. Where do you land? __
2. Start at 15 and move backward 5 spaces. Where do you land? __
3. Which number is halfway between 10 and 20? __
4. Circle the number closest to 20: 12, 16, 18

10. Challenge and Extension

1. Find two different addition sentences that equal 20.

   __ + __ = 20

   __ + __ = 20

2. Find two different subtraction sentences that equal 12.

   __ − __ = 12

   __ − __ = 12

3. I am greater than 14 and less than 18. I am an even number. What number am I? __

4. There are 20 blocks. You build a tower with 8 blocks and a bridge with 7 blocks. How many blocks are not used?

   Number sentence: __

   Answer: __ blocks

Reflection

Choose one sentence and complete it.

• I used __ to help me solve a problem.
• The easiest part was ____.
• One strategy I want to practice more is ____.

Answer Key

1. Count to 20

A. 3, 6, 9, 12, 15, 18, 20

B.

2. Show the Number

Answers should show the correct number of objects: 6, 12, 17, and 20.

3. Number Representations

Possible answers:

4. Compare Numbers

1. 5 < 9
2. 13 = 13
3. 18 > 12
4. 7 < 15
5. 20 > 19
6. 10 = 10

The explanation will vary but should correctly describe the comparison.

5. Add Within 20

1. 7
2. 8
3. 10
4. 14
5. 16
6. 20

6. Subtract Within 20

1. 4
2. 6
3. 10
4. 9
5. 9
6. 15

7. Real-World Math Mission

1. 8 + 6 = 14 pieces of fruit
2. 20 − 7 = 13 cups
3. 9 + 9 = 18 students
4. Answers will vary. The number sentence should equal 20.

8. Sort and Explain

Even numbers: 8, 10, 16, 20

Odd numbers: 3, 13, 19

An even number can be divided into two equal groups with none left over. It also ends in 0, 2, 4, 6, or 8.

9. Number Line Activity

1. 10
2. 10
3. 15
4. 18

10. Challenge and Extension

1. Answers will vary. Examples: 12 + 8 = 20 and 15 + 5 = 20.
2. Answers will vary. Examples: 15 − 3 = 12 and 20 − 8 = 12.
3. 16
4. 20 − 8 − 7 = 5 blocks