Curated OER
Who Wants to Win Millions: Subtraction
Review subtraction skills with this entertaining game. Learners answer a series of subtraction problems involving two and three digit numbers. This resource could be used a a quick class review or as a center activity.
Flipping Physics
AP Physics 1: Equations to Memorize
Saving the best for last, the final video in the series of 12 covers all of the equations young physicists should memorize because they are not on the equation sheet provided at the time of AP Physics 1 exam. This fast-paced video even...
Curated OER
Deciphering Word Problems in Order to Write Equations
Help young mathematicians crack the code of word problems with this three-lesson series on problem solving. Walking students step-by-step through the process of identifying key information, creating algebraic equations, and finally...
Arcademics
Island Chase Subtraction
Scholars boost subtraction skills with a multiplayer learning game. Jet skis race through the water, gaining speed and distance with every correct answer a learner provides.
Curated OER
Solving Subtraction Equations
In this solving subtraction equations learning exercise, 6th graders read examples of using fact families, working backwards or using inverse operations, then solve eight subtraction equations with variables.
Curated OER
Basic Subtraction Facts
In this basic subtraction facts worksheet, students problem solve and calculate the answers to twenty subtraction equations. Students double-check their answers with their classmates.
Curated OER
Three Digit Subtraction Worksheet 1
In this three digit subtraction instructional activity, students calculate the answers to thirty mathematical subtraction equations.
Curated OER
Difference of Equations
In this difference of equations instructional activity, students solve and complete 49 various types of problems. First, they obtain the solution of any linear homogeneous second order difference equation. Then, students apply the method...
Curated OER
Jellyfish Jumble
In this subtraction equations activity, learners solve 8 problems in which 3 numbers inside a jellyfish shape are arranged to make a subtraction equation. Students solve and check by adding.
Curated OER
Related Addition and Subtraction
Warm up your mathematicians using this fact families worksheet! Because the answer is explained below, consider projecting this for the whole class and uncovering the bottom half after collecting student responses. There are two...
Illustrative Mathematics
The Napping House
How many people and animals can cram into a single bed? Find out with this cross-curricular math and language arts lesson. Following along with a reading of the children's book The Napping House by Audrey Wood, young mathematicians add...
CK-12 Foundation
Linear Systems with Addition and Subtraction: Fill in the Boxes 2
Systematically combine shapes to arrive at one solution. The resource models a system of linear equations using colored shapes. Pupils follow rules to combine circles and squares to add the two equations together, resulting in one...
CK-12 Foundation
Linear Systems with Addition and Subtraction: Fill in the Boxes 1
Eliminate a color by dragging shapes. The interactive provides a graphical color display that allows for pupils to solve a linear system by elimination. Learners combine figures following set rules for positive and negative shapes. The...
West Contra Costa Unified School District
Connecting Arithmetic Sequences to Linear Equations
Common difference is to arithmetic sequences as what is to linear equations? (Answer: slope) Pupils learn how arithmetic sequences can be considered as linear patterns. They then write linear equations to represent arithmetic sequences...
CK-12 Foundation
Linear Systems with Addition and Subtraction: XYZ Tiles
Cover it up to reveal the values of variables. Using arrangements of colored tiles representing algebraic expressions, pupils layer them over each other to determine the values of variables. The procedure models the elimination method in...
Curated OER
Column Subtraction - 3 Digits Sheet 1
In this column subtraction worksheet, learners review rules to help them complete three digit subtraction. They solve the equations using the column subtraction method.
Curated OER
Number Line Subtraction
Mathematicians solve and complete 20 different problems that include various number lines. They subtract each given equation using the number line illustrated on the sheet. Then, pupils determine whether the answer is a negative or...
Curated OER
Add and Subtract Equations With Equal Sign - Guided Lesson Explanation
What sign is missing? Is this equation true? Rather than a learning exercise, this resource is a one-page script for a guided lesson on addition and subtraction equations. While the pupil handout is missing, the teacher guide could be...
Curated OER
Writing Simple Subtraction Equations
In this writing simple subtraction equations activity, 1st graders look at three animal pictures and write the equation that goes with it.
Curated OER
Writing Equations From Patterns
For this writing equations worksheet, 9th graders solve and complete 6 different problems that include various patterns. First, they read and identify relations of equations and the difference between successive values of x and y. Then,...
Maths Blog
Understand Subtraction - Take Whole Tens
Use a number line to demonstrate subtracting by tens. Learners "hop" backwards down a tens number line to complete subtraction equations. Several different ways to express the operation are included.
Illustrative Mathematics
What’s Missing?
Now you see them, now you don't! This fun peek-a-boo activity engages young mathematicians in developing their ability to compose and decompose numbers. After being presented with a series of counters, children close their eyes while the...
Curated OER
Writing Equations: Subtraction 0 to 20
Here are 9 subtraction problems all resulting in differences less than 20. Each problem is worded a different way: take away, minus, or subtract _ from _. This is great because it demonstrates the various ways subtraction problems may be...
Curated OER
Quadratic Equations with Negative Discriminate
Solve polynomial equations of degree using different theorems and apply the zero factor theorem for unknown numbers in a quadratic equation. Also use the discriminate to find out the kind of solutions to given quadratic equations shown.
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