Math Worksheet for Students

Instructions

1. Complete each section in order.
2. Write numbers carefully and count objects one time each.
3. Use drawings, cubes, or your fingers if you need help.
4. Try the optional challenge after finishing the core questions.

1. Meet the Number 20

Example: 20 is written as twenty.

1. Write the number that comes before 20: __
2. Write the number that comes after 20: __
3. Trace or write the number five times: 20, 20, 20, 20, 20

4. Circle every number that is equal to 20.

12  20  18  20  2  10  20

2. Count by Tens

Complete the pattern.

1. 10, 20, __, __, __
2. 0, 10, 20, __, __
3. 20, 30, __, 50, __
4. __, 20, 30, 40, __

Hint: Count forward by 10 each time.

3. Build 20

Complete each number sentence. You may use counters or draw dots.

1. 10 + __ = 20
2. 15 + __ = 20
3. 18 + __ = 20
4. 20 - 10 = __
5. 20 - 5 = __
6. 20 - 2 = __

4. Ways to Make 20

Example: 12 + 8 = 20

Complete the table with a different way to make 20 in each row.

5. Real-World Math

1. A basket has 20 apples. Mia takes 3 apples. How many apples are left?

   Number sentence: ____

   Answer: __ apples

2. A teacher has 10 blue pencils and 10 red pencils. How many pencils are there altogether?

   Number sentence: ____

   Answer: __ pencils

3. You have 20 cents. You spend 7 cents. How many cents do you have left?

   Number sentence: ____

   Answer: __ cents

4. There are 20 students in a group. 5 more students join. How many students are there now?

   Number sentence: ____

   Answer: __ students

6. Show What You Know

1. Draw 20 dots. Organize them into groups to make counting easier.

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   ---

2. Write two different addition sentences that equal 20.

   a. __

   b. __

3. Explain how you know that 19 is less than 20.

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   ---

Optional Challenge

1. Find three different numbers that can be added to 20 to make 30.

   __ + 20 = 30

   __ + 20 = 30

   __ + 20 = 30

2. There are 20 stickers. They are shared equally among 4 children. How many stickers does each child get?

   Answer: __ stickers each

3. Use the digits 2 and 0 to write a number. What number do they make? __

Answer Key

1. Meet the Number 20

1. 19
2. 21
3. 20 for each blank
4. Circle 20, 20, and 20.

2. Count by Tens

1. 30, 40, 50
2. 30, 40
3. 40, 60
4. 10, 50

3. Build 20

1. 10
2. 5
3. 2
4. 10
5. 15
6. 18

4. Ways to Make 20

Answers may vary. Examples include:

• 1 + 19 = 20
• 5 + 15 = 20
• 6 + 14 = 20
• 9 + 11 = 20
• 10 + 10 = 20

5. Real-World Math

1. 20 - 3 = 17 apples
2. 10 + 10 = 20 pencils
3. 20 - 7 = 13 cents
4. 20 + 5 = 25 students

6. Show What You Know

1. Student should draw 20 dots. Any organized arrangement is correct.
2. Answers may vary. Examples: 10 + 10 = 20 and 14 + 6 = 20.
3. Sample answer: 19 is less than 20 because 19 comes before 20 when counting.

Optional Challenge

1. 10, 10, and 10
2. 5 stickers each
3. 20