Illustrative Mathematics
Gifts from Grandma, Variation 3
There are three money word problems in this activity, each one is set in the same context. The first asks what was the total amount grandma spent, the second how many grandchildren grandma has, and the third asks how much grandma spent...
Corbett Maths
Decimals to Percentages
Complete a quick conversion. Pupils view the short video to learn the process to convert a decimal to a percent. The scholars then practice the skill with two worksheets, giving them a chance to better understand the concept.
Krista King Math
Decimal Arithmetic
Teach the four operations with decimal numbers while focusing on the algorithms. The video instructor demonstrates one example each of adding, subtracting, multiplying, and dividing with decimal numbers. She explains the steps of each...
Curated OER
How Do You Divide a Decimal by a Decimal?
Many learners would look at this decimal division problem and just skip it. Don't let them do that! Figure out how to help your learners master long division. The teacher helps make decimals and long division seem doable.
Krista King Math
Decimal Equations
Extend your classes' understanding of solving equations by introducing decimals into the mix! Here, a video tutorial shows how to convert decimals to integers in an equation by multiplying by powers of 10. Shows three examples of...
Curated OER
Repeating Decimal as Approximation
You are used to teaching repeating decimals with bar notation that keeps us from writing that number over and over again; now teach what the over and over again represents. This activity allows your mathematicians to explore the infinite...
Illustrative Mathematics
Half of a Recipe
Kids love to cook! What is a better place to learn mixed numbers than with a recipe? It is up to learners to decide how they want to divide this recipe in half. They may choose to model the mixed number and then divide the model by two....
Curated OER
Lesson 3: Number Sense
Learners solve word problems using number sense. They convert fractions to decimals and mixed numbers. Pupils determine if a given fraction is greater or less than another fraction, and order numbers on a number line.
Curated OER
Problem Solvers
Fifth and sixth graders compare decimals to the place-value structure in the base-ten number system. They represent fractions as parts of unit wholes, as parts of a set, as locations on a number line, and as divisions of whole numbers....
Curated OER
How Do You Turn a Decimal Into a Percent?
Multiply a decimal number by 100 to get a percent number. Or take a shortcut and merely move the decimal point two places to the right. But don't forget to write the percent sign after you move the decimal. Otherwise it's just a number...
Virtual Nerd
How Do You Use an Equation to Find a Part of a Whole?
Watch the instructor change a percent into a decimal and multiply it by the original number to determine the percent. One idea would be to embed this video in a PowerPoint presentation, or assign it as homework with your flipped...
Illustrative Mathematics
Margie Buys Apples
One of the most common, everyday applications of math is dealing with money. This single problem calculating how much change Margie receives is more involved than it appears at first glance. An understanding of how fractions and decimals...
Curated OER
How Do You Figure Out Which of Two Fractions is Bigger?
Trying to decide which method to use to compare the value of two fractions? You could find a common denominator, you could turn them into decimals, or you could cross multiply. Let's cross multiply because we like to multiply more than...
Curated OER
Estimating Surface Area
Kids might enjoy this dramatic presentation on estimating surface area. The fake Transylvanian accent is a bit distracting but the problem solving practices are sound. Dr. Crazy Pants rounds his decimal measurements then multiplies...
EngageNY
Grade 5 Math Module 1, Topic F, Lesson 16
See, decimal operations do come in handy! Pupils solve word problems that require adding, subtracting, multiplying, and dividing decimals. They use tape diagrams to express relationships and to identify the necessary operations to solve...
EngageNY
Grade 5 Math Module 1, Topic E, Lesson 12
Continuing from the previous instructional activity, scholars work on mastering the skill of multiplying decimal fractions by a whole number. The method employed in the instructional activity is to convert the decimal fraction to its...
Curated OER
Relating Fractions, Decimals and Percents
Students convert numbers to fractions, decimals and percents. In this conversion lesson, students convert fractions, decimals and percents to a specified form. Groups of students play a conversion index card game. A worksheet, game...
Math Antics
Comparing Fractions
Comparing fractions, it is just not the same as comparing whole numbers. The video starts with fractions with common denominators and moves on to comparing fractions that are not as obvious. Scholars learn two techniques, cross...
Curated OER
How Do You Figure Out a Percent of Change?
First identify the parts of the word problem. Next identify the variable, decide what formula to use, figure out the quantities, insert the quantities into the equation, and now solve. There are many parts to solving this word problem so...
Willow Tree
Rational vs. Irrational Numbers
Build an understanding of rational numbers and their counterpart irrational numbers. Lead learners through an explanation of rational numbers and the ways they can be expressed. Then introduce them to irrational numbers and make...
Curated OER
Multiplication and Division Word Problems Made Easy
Marbles to learn math? What fun! Discuss the rules of multiplication and division when applied to whole numbers, decimals, and fractions. Small groups use6 marbles to design different types of multiplication and division problems, and...
Curated OER
Number Operations
Inject fun into your math review! Pupils review basic math operations with decimals as well as addition and subtraction with simple fractions. In this number operations activity, young scholars work in groups to create a game for the...
EngageNY
Decimal Expansions of Fractions, Part 1
Is it possible to add infinitely long decimals? As pupils complete the examples in the ninth lesson of this 25-part series, they determine that adding these decimals cannot be done without error. Their task is then to determine the size...
Curated OER
Arithmetic: Fractions
Mathematics aces, after a warm-up activity with some easy calculations, practice solving rules of signs and powers of 10 equations. Multiplying and dividing decimals is also covered within this lesson in depth. A variety of examples and...
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