Decimals Teacher Resources
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Representing a Number as a Decimal, Percent, and Fraction, Part 2
There are two Khan Academy videos on representing numbers as decimals, percents, and fractions. This one shows students how to represent a fraction as a decimal and a percent. Sal demonstrates the process used to convert the fraction 7/8 into a decimal and then a percent.
5 mins 5th - 7th Math 29 Views 155 Downloads CCSS: Adaptable
Representing a Number as a Decimal, Percent, and Fraction, Part 1
Clear up the confusion and help your learners make the connection between percents, decimals and fractions. This video describes the process needed to write 18% first as a decimal, and then as a fraction in its simplest form. Sal does a succinct job of explaining these concepts.
4 mins 5th - 7th Math 19 Views 132 Downloads CCSS: Adaptable
Mr. Khan reminds us that the most important thing to remember when subtracting decimal numbers is to line up the decimal points. He subtracts 3.600 from 9.005, explaining his thinking as he completes the process. Assign the viewing of this tutorial as homework and then have youngsters come to class ready to practice together!
2 mins 5th - 7th Math 13 Views 63 Downloads CCSS: Adaptable
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 decimal and see how different calculations get us close to the original number, but not quite exactly on it.
6th - 9th Math 10 Views 5 Downloads CCSS: Designed
Equivalent fractions approach to non-repeating decimals
Trying to get your class to think of decimals as fractions and vice versa can lead to interesting discussions. After all, we can usually understand quickly that 1/4 is .25 but why is 1/7 not so easy to convert? This activity looks at these problems and tries to draw conclusions about why certain numbers are easier to work with mentally, leading to interesting insights into our number system and powers of ten.
6th - 8th Math 22 Views 24 Downloads CCSS: Designed
Multiplying decimal numbers isn't that much different than multiplying whole numbers. If you need a little extra support, this video may help. Sal shows how to multiply 23.12 by 0.5. He takes care to line up the decimal points, regroup, and place the decimal in the proper place when he finishes his computation.
3 mins 5th - 7th Math 15 Views 114 Downloads
Divide decimals. Watch as Sal explains how to divide 1.03075 by 0.25. He provides a step-by-step process that is easy to follow, clear, and well-organized. Note: This would be great for a teacher prepping for a math lesson or as supplemental material to show in class.
6 mins 5th - 7th Math 15 Views 95 Downloads
Multiplying Decimals 3
Have your young mathematicians complete this practice problem along with Sal. To solve this thinking problem, they will need to multiply decimal numbers in order to determine the cost of 14.6 gallons of gas when gas costs $2.70 per gallon.
3 mins 5th - 7th Math 8 Views 36 Downloads
Decimal Place Value
Having a good number sense is key to understanding place value. This video clearly explains the place values that comprise a decimal number. It is a very straight forward presentation and would be appropriate for grades 3, 4, or 5. Sal uses multiple colors and expanded notation to describe the value of each number.
4 mins 3rd - 5th Math 93 Views 285 Downloads CCSS: Adaptable
Compare Decimals Using a Number Line
Check out how a number line can be used to compare decimals to the thousandths place in the second of three videos. The instructor helps avoid the pitfall of thinking that a longer number equals a number of greater value. She then thoroughly walks through several samples, including a word problem, of comparing decimals on the number line.
2 mins 4th - 6th Math 10 Views 12 Downloads CCSS: Designed
Compare Decimals Using an Open Number Line
Learn a new tactic for comparing decimals: the open number line! This is the final video in a five-part series on reading and writing decimals to the thousandths. Beginning with a review of greater than, less than, and equal symbols, the lesson continues with a discussion of how many times greater each place is than the previous place, and how greater numbers are to the left, lesser to the right.
5 mins 4th - 6th Math 17 Views 15 Downloads CCSS: Designed
Represent Equal Decimals Using Zeroes
How can two decimals be written differently but still be equal? With zeroes! That's what learners work to understand in the third of five lessons on reading and writing decimals to the thousandths place. Visuals that help learners grasp the concept include dimes versus pennies and tens blocks versus ones blocks and hundreds blocks.
6 mins 4th - 6th Math 6 Views 5 Downloads CCSS: Designed
Eight problems get seventh graders selecting the likelihood of certain real-world events occurring. They relate the probabilities in fraction, decimal, and percent form. No answer key is provided, so make sure to create one prior to going over answers with your class.
6th - 8th Math 18 Views 19 Downloads CCSS: Designed
Real-life Problems, Working with Decimals
Put your learners' decimal skills to the test with these five word problems. With space for students to write their work, the word problems contain addition and multiplication problems with money and measurement units. Use this resource as a quiz or an in-class activity to fully assess your class's comprehension.
4th - 5th Math 60 Views 175 Downloads CCSS: Designed
Working with decimals or money math? Give your class some practice with subtraction and place value. After solving 18 subtraction problems with decimals and money units, fourth graders work on two word problems. A great homework assignment or quiz after your math lesson.
4th - 5th Math 16 Views 124 Downloads CCSS: Designed
Reading and Writing Decimals
Decimals are quite often confusing for young mathematicians. Pupils engage in three activities: writing decimal names, understanding place value, and comparing decimals to thousandths. At the end of the lesson, there is a motivating game called beat the clock which will test your students' ability to correctly write decimals.
5th Math 66 Views 194 Downloads CCSS: Designed
Young mathematicians represent recorded information in decimal form. In this decimals instructional activity, learners play a "classroom friendly" basketball game in which pupils take 10 shots. Number of shots made out of 10 is recorded as a fraction and decimal, followed by calculating number of shots out of 100.
4th - 6th Math 5 Views 170 Downloads
Base Ten Activity
Base ten blocks are great tools for developing not only an understanding of whole numbers, but of decimals as well. This upper-elementary lesson plan uses these versatile manipulatives and the array model to teach young mathematicians how to multiply and divide decimals.
4th - 6th Math 65 Views 48 Downloads CCSS: Designed