Assessment
Illustrative Mathematics

Find the Missing Number

For Students 1st Standards
First graders are asked to find the missing numbers in subtraction and addition equations. Each missing number is represented with a box and appears as an addend, subtrahend, sum, or difference.
Interactive
CK-12 Foundation

Addition and Subtraction of Polynomials: Sliders

For Students 8th - 10th Standards
Slide the coefficients to determine sums of polynomials. The interactive contains sliders to change the coefficients of an addend in a polynomial addition problem. Pupils determine the coefficients of the addend to arrive at particular...
Interactive
CK-12 Foundation

Decimal Addition: Adding Little Pieces

For Students 4th - 6th Standards
A five-question interactive test scholars' knowledge of adding and subtracting decimals. A tool aids in problem-solving with movable parts that reveal addends and sums. Question types include one discussion, fill and in the blank, and...
Worksheet
Curated OER

Addition - Adding on Ones Sheet 2

For Students 2nd - 3rd Standards
In this missing addend worksheet, students fill in missing addends to arrive at given sums. All numbers are 2-digit. A reference website is given for additional activities.
Worksheet
Math Salamanders Ltd.

Addition - Up to 20 Sheet 5

For Students 1st - 3rd Standards
In this addition worksheet, learners complete missing addend problems by plugging in numbers one to 20. Students complete 40 problems.
Organizer
Curriculum Corner

Second Grade Summer Math Practice Book

For Students 1st - 3rd Standards
Stop the summer lag with a set of second grade Common Core based math practice sheets. Learners fill in hundreds charts with missing numbers up to 1,000. They practice writing numbers in standard, expanded, and word form. Children also...
Worksheet
Math Salamanders Ltd.

Addition - Up to 12 Sheet 4

For Students 1st - 2nd Standards
In this addition worksheet, students solve horizontal addition problems. They count on to find the missing addend.
Assessment
Concord Consortium

The Trouble with Tables

For Students 2nd - 5th Standards
Tackle these tables. A performance task has learners complete two puzzles using addition and subtraction. They must fill in tables with missing addends, sums, minuends, subtrahends, or differences.
Worksheet
Math Salamanders Ltd.

Addition—Up to 12 Sheet 5

For Students 1st - 3rd Standards
In this addition activity, learners complete 24 problems, filling in missing numbers, either addends or sums. A reference website is provided for additional activities.
eBook
Savvas Learning

Saxon Math 5/4

For Teachers 3rd - 5th Standards
You'll never have to search for another worksheet again after downloading this extensive collection of Saxon math materials. With over 600 pages of example problems and skills practice exercises, this is a must-have resource...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Cave Game Subtraction

For Teachers 1st - 2nd
The purpose of this task is for students to practice creating and memorizing subtraction equations while focusing on missing addends. After modeling the activity with the whole class, this game would be perfect for centers and small groups.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Calculating Sums (Numbers Up to 100,000)

For Students 4th - 5th Standards
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are presented with a set of numbers up to 100,000, most of which end with one or more zeroes, and must apply their understanding of...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Boys and Girls, Variation 2

For Teachers 1st - 2nd Standards
Students are asked to solve a word problem with both addends unknown. They will write an equation and draw a picture to use to explain their answer.
Unknown Type
Math Slice

Math Slice Fast Sum

For Students 1st - 3rd Standards
This resource is a set of ten timed practice problems where parameters are selected for the sum and the range of addends. The sum and one addend are given and students determine the missing number to create the sum. Instant feedback and...

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