I use these worksheets constantly during our the bulk of our school year when we are learning about part/part/whole and addition/subtraction within 20. The worksheets are visually pleasing and there are so many options!

— Rachel K.

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Description

This packet has everything you need to teach the Part-Part-WHOLE strategy/finding the unknown/missing numbers. This pack will help students with basic addition and subtraction facts, counting on, fact families, subitizing, and speed/automaticity with math facts. Using manipulatives and Part-Part-Whole printables will reinforce students’ understanding of number bonds and parts of a whole.

What’s included?

This packet covers determining the unknown whole number in an addition or subtraction equations relating three whole numbers. It includes over 30 worksheets and 9 assessments.

They are divided into four sections:

Poster
Worksheets: Addition and Subtraction: Missing Whole (Missing Sum), Missing Parts (Missing Addends), blank printables for your students.
Assessments
Answer Keys

How do I use it?

These printables are designed for math centers, independent practice, homework, or for use in small groups.

★★★ PLEASE VIEW THE PREVIEW! ★★★

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Thank you!

©Evelyn Munoz, In the Land of Teaching

Materials are intended for personal use in one classroom only.

For use in multiple classrooms, please purchase additional licenses.

Keywords: Number Bonds, Number sense, Missing number

Total Pages

52 pages

Answer Key

Included

Teaching Duration

Lifelong tool

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Standards

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

CCSS1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

CCSS1.OA.B.4

Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.

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 = ▯.

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