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Additon to 20 (Counting On/Number Line) Test 1 - Printable Mathematics Worksheets year 1 - Wayground

Additon to 20 (Counting On/Number Line) Test 1

10 questions

1st - 1st Grade

Mathematics

This free printable Grade 1 mathematics worksheet, Addition to 20 (Counting On/Number Line) Test 1, gives students 10 multiple-choice problems focused on adding within 20. The first items ask students to solve by counting on, while the remaining items require them to use a number line to find sums such as 6 + 8 and 9 + 8. It is designed for early addition practice, independent work, or a quick formative check of strategy use and accuracy. Students build fluency by identifying the starting number, counting forward the correct number of steps, and connecting that process to addition equations. The multiple-choice format also helps teachers spot errors such as reversing the addends, miscounting jumps, or selecting an answer based on the digits rather than the sum. This free printable worksheet includes a complete answer key for convenient checking and review.

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Worksheets

Additon to 20 (Counting On/Number Line) Test 1

Total questions: 10

Name
Class
Date
1.

Solve the problem by counting on.

a)

12

b)

15

c)

20

d)

9

2.

Solve by counting on.

a)

20

b)

15

c)

10

d)

5

3.

Solve by counting on.

a)

6

b)

20

c)

11

d)

5

4.

Solve by counting on.

a)

14

b)

20

c)

16

d)

18

5.

Solve by counting on.

a)

13

b)

7

c)

6

d)

20

6.

Use the number line to solve.

6 + 8 =____

a)

68

b)

14

c)

10

d)

20

7.

Use a number line to solve.

6+7=___

a)

6

b)

67

c)

13

d)

17

8.

Use a number line to solve.

14 + 1 =___

a)

15

b)

13

c)

20

d)

141

9.

Use a number line to solve.

10 + 4 = ___

a)

16

b)

122

c)

14

d)

10

10.

Use a number line to solve.

9 + 8 = ___

a)

17

b)

98

c)

9

d)

20

Answer Key

Additon to 20 (Counting On/Number Line) Test 1

Total questions: 10

1.
a)

12

2.
b)

15

3.
c)

11

4.
d)

18

5.
a)

13

6.
b)

14

7.
c)

13

8.
a)

15

9.
c)

14

10.
a)

17

FAQs

What does this worksheet cover?

This Grade 1 worksheet covers addition within 20 using two related strategies: counting on and moving forward on a number line. Its 10 multiple-choice items help students identify the starting number, count the required steps, and connect the final position to the correct addition sum.

How can I use this worksheet to teach counting on and number-line addition?

Model one counting-on problem by starting with the larger addend and saying each number as you count forward. Then demonstrate a number-line equation by making one jump for each unit being added, and have students explain why the landing number is the sum before completing the remaining multiple-choice items independently.

What mistakes should I watch for when students complete this worksheet?

Watch for students who start counting at the wrong number, count the starting position as a jump, or stop before making all the required moves. The answer choices also reveal common errors such as treating the digits in an equation as a combined number, reversing the counting direction, or choosing the starting number instead of the sum.

How do I assign and grade this worksheet?

Wayground provides this worksheet as both a printable PDF and a digital quiz, and it includes a complete answer key for all 10 multiple-choice questions. Printable submissions can be graded by scanning student work with the Wayground for Teachers app, while the digital version supports online completion and grading.

How can I differentiate this counting-on and number-line worksheet for my students?

Under the worksheet’s Advanced Settings, adjust font spacing or choose a larger font size to make the addition equations, answer choices, and number-line directions easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language while keeping its counting-on and number-line format.

Where can I find more worksheets like this on Wayground?

Wayground offers a comprehensive collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.