Make 20 Addition Worksheets | Missing Number to 20 | Grades 1–2 Math Practice

Description

Use this Make 20 – Addition Missing Number pack to help your Grade 1 and Grade 2 students build strong number sense and fluency with addition within 20. Students complete equations to make a sum of 20

The pages are clean, simple, and student-friendly — perfect for independent practice, small-group instruction, math centers, intervention, or homework.

What’s Included

✔ 10 student worksheets — Make 20 Addition (Missing Number)
✔ 10 matching answer keys — perfect for quick grading or self-checking

➡️ Total: 20 printable pages

Aligned to Common Core Standards 1.OA.D.8, 1.OA.C.6, and 1.OA.B.3, this resource supports students as they learn to determine the missing addend and understand number relationships that make 20.

Just print and go — zero prep required!

Thank you to Tilly Templates for the free border clipart frames.

https://www.teacherspayteachers.com/Product/250-BW-Digital-Doodle-Page-Border-ClipArt-Frames-12767350

Report this resource to TPT

Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Make 20 Addition Worksheets | Missing Number to 20 | Grades 1–2 Math Practice

Name: Make 20 Addition Worksheets | Missing Number to 20 | Grades 1–2 Math Practice
Brand: Learn & Glow Learning
SKU: 15150810
Price: 2.25 USD
Availability: InStock

Learn & Glow Learning

$2.25

Highlights

Digital downloads

PDF

Grades

1st - 2nd

Subjects

Basic Operations, Numbers

Standards

CCSS1.OA.B.3

CCSS1.OA.C.6

CCSS1.OA.D.8

Description

The pages are clean, simple, and student-friendly — perfect for independent practice, small-group instruction, math centers, intervention, or homework.

What’s Included

✔ 10 student worksheets — Make 20 Addition (Missing Number)
✔ 10 matching answer keys — perfect for quick grading or self-checking

➡️ Total: 20 printable pages

Aligned to Common Core Standards 1.OA.D.8, 1.OA.C.6, and 1.OA.B.3, this resource supports students as they learn to determine the missing addend and understand number relationships that make 20.

Just print and go — zero prep required!

Thank you to Tilly Templates for the free border clipart frames.

https://www.teacherspayteachers.com/Product/250-BW-Digital-Doodle-Page-Border-ClipArt-Frames-12767350

Report this resource to TPT

Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

This product has not yet been rated.

Rated 0 out of 5

Questions & Answers

Standards

to see state-specific standards (only available in the US).

CCSS1.OA.B.3

Apply properties of operations as strategies to add and subtract. If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)

CCSS1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

CCSS1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ▯ - 3, 6 + 6 = ▯.