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High Group - add. & sub. to 20 and relative facts - Printable Math Worksheets 1st Grade - Wayground

High Group - add. & sub. to 20 and relative facts

Kaley Quillman

Created by Kaley Quillman

21 questions

1st Grade

Math

This free printable Grade 1 mathematics worksheet helps students build related addition and subtraction facts to 20. Across 21 multiple-choice questions, students identify whether number sentences form a fact family, match number sets to addition or subtraction equations, rewrite addition facts as subtraction and subtraction facts as addition, complete fact families, and solve missing-number equations such as 7 + __ = 10 and 10 − __ = 5. The worksheet is designed for learners who are ready to connect inverse operations and use known facts to solve related equations. Its repeated fact-family practice helps students recognize how the same three numbers can represent two addition sentences and two subtraction sentences, while the missing-number items reinforce flexible reasoning rather than rote recall. A complete answer key is included, making this free printable worksheet useful for independent practice, small-group instruction, review, or quick assessment.

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High Group - add. & sub. to 20 and relative facts

Total questions: 21

Name
Class
Date
1.
Is this a fact family?

Is this a fact family?

a)
Is this a fact family?
b)
Is this a fact family?
2.
Is this a fact family?

Is this a fact family?

a)
Is this a fact family?
b)
Is this a fact family?
3.
Is this a fact family?

Is this a fact family?

a)
Is this a fact family?
b)
Is this a fact family?
4.

Which equation goes with the fact family 6, 7, 13.

a)

7 - 6 =1

b)

7 + 6 = 13

c)

1 + 6 = 7

5.

Which equation goes with the fact family 9, 5, 14?

a)

14 - 9 = 5

b)

9 - 4 = 5

c)

14 + 9 = 5

6.
Rewrite this addition fact family as subtraction
2 + 3 = 5
a)
3+ 2 = 5
b)
5 - 3 = 2
7.
Rewrite this number sentence as an addition sentence
5 - 2 = 3
a)
3 + 2 = 5
b)
5 - 3 = 2
8.

Pick the missing number.

7+______=10

a)

4

b)

2

c)

3

d)

17

9.
Find the addition sentence for this subtraction fact;
6 - 2 = 4
a)
2 - 6 = 4
b)
6 - 4 = 2
c)
2 + 4 = 6
d)
6 + 4 = 2
10.

Pick the missing number.

4+______=11

a)

6

b)

7

c)

15

d)

9

11.
Find the subtraction sentence for this addition fact:
3 + 6 = 9
a)
6 - 3 = 9
b)
9 - 6 = 3
c)
9 - 4 = 5
d)
9 + 3 = 6
12.

Pick the missing number.

10-_______=5

a)

15

b)

5

c)

6

d)

4

13.
Finish this fact family.
2+8=10
8+2=10
10-2=8
a)
10-5=5
b)
8-2=10
c)
10-8=2
d)
8-10=2
14.
Which addition sentence matches the fact family?
5, 6, 11
a)
5+11=6
b)
5+6=11
c)
2+8=10
d)
5+11+16
15.
13 - 2 = 
a)
15
b)
11
c)
10
d)
16
16.
Which fact is missing?
7+4=11
_______
11-4=7
11-7=4
a)
11-11=0
b)
4+7=11
c)
2-1=1
d)
7+4=11
17.
17 - 6 = 
a)
11
b)
10
c)
9
d)
23
18.
What number belongs in the box.
What number belongs in the box.
a)
3
b)
4
c)
6
d)
5
19.
3 + 5 = 
a)
2
b)
10
c)
8
d)
7
20.

Which equation does NOT go with the fact family 8, 5, 13?

a)

8 + 5 = 13

b)

5 + 8 = 13

c)

8 - 5 = 3

21.

Pick the missing number.

9+______=18

a)

8

b)

9

c)

27

d)

6

WaygroundAnswer Key

High Group - add. & sub. to 20 and relative facts

Total questions: 21

1.
b)
2.
b)
3.
b)
4.
b)

7 + 6 = 13

5.
a)

14 - 9 = 5

6.
b) 5 - 3 = 2
7.
a) 3 + 2 = 5
8.
c)

3

9.
c) 2 + 4 = 6
10.
b)

7

11.
b) 9 - 6 = 3
12.
b)

5

13.
c) 10-8=2
14.
b) 5+6=11
15.
b) 11
16.
b) 4+7=11
17.
a) 11
18.
b) 4
19.
c) 8
20.
c)

8 - 5 = 3

21.
b)

9

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FAQs

What does this worksheet cover?

This Grade 1 worksheet covers fact families and related addition and subtraction facts to 20 through 21 multiple-choice questions. Students identify fact families, match number sets such as 6, 7, and 13 to equations, convert addition sentences into subtraction sentences and vice versa, complete fact families, and find missing numbers in equations.

How can I use this worksheet to teach fact families and related addition and subtraction facts?

Introduce a set of three numbers, such as 6, 7, and 13, and have students build the two addition and two subtraction sentences before they answer the matching questions. Then model how a known fact supports a missing-number equation, such as using 7 + 3 = 10 to solve 7 + __ = 10. Ask students to explain which numbers stay in the fact family and how the operation changes.

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

Students may select a reversed or unrelated subtraction sentence when rewriting an addition fact, such as choosing 14 − 9 = 5 instead of matching the given relationship correctly. They may also confuse the two addition sentences with subtraction facts, omit one of the four related equations, or choose a distractor number without checking whether the completed equation is true. Encourage students to verify each answer using all three numbers in the fact family.

How do I assign and grade this worksheet?

This fact-family worksheet is available as a printable PDF and as a digital quiz on Wayground. It includes a complete answer key, and printable submissions can be graded by scanning student work with the Wayground for Teachers app. Use the multiple-choice results to identify whether students need more practice with equation relationships or missing numbers.

How can I differentiate this fact-family worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing or increase the font size so the multiple-choice equations and answer options are easier to read. You can also apply a dyslexia-friendly font or translate the fact-family questions into another language when appropriate.

Where can I find more worksheets like this on Wayground?

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

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