Multiplying 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. This presentation is very well done and would be great at an independent work station or as homework support.
Multiplying And Dividing with Significant Figures
Sal takes out the big guns - or in this case, big calculator - in this video, which carries the concept of significant figures even further. Sal shows how to multiply and divide significant figures using both electronic and handwritten calculations.
Real-life Problems, Working with Decimals
Put your learners' decimal skills to the test with these five word problems. With space for learners 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.
Chapter 5: Decimal Notation
Explore all things decimal in this thorough series of introduction activities. Including scripting for the teacher and detailed descriptions and examples, the plan begins by reviewing the basics of place value and writing fractions as decimals, works through rounding, adding, subtracting, multiplying and dividing numbers with decimals, and culminates in word problems and linear equations involving decimals.
How Do You Multiply Decimals?
Find the product of numbers that have decimals. First, ignore the decimals and multiply the integers. Second, count the place values of the decimals for each value given. Third, add the values together. Fourth, place the decimal in the appropriate place.
In this math worksheet, students practice multiplication of decimals. Students begin by multiplying whole numbers by decimals, then decimal numbers by decimals, up to the thousandths place. The problems are written both in horizontal and vertical form. Multiplication (mental) of decimals by 10, 100 and 1000 are also included. Hints and clues are provided.
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.
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.
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.
Fraction and Decimal Equivalency
Mathematicians make representations of fractional parts of a whole and learn that a decimal is another way to represent a fractional part. Understanding is extended by comparing and ordering fractions and decimals on a number line. This high-quality resoucre comes complete with student handouts. Make sure to consider it for addressing Common Core standards in math.
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.
Discount and Sales Price
One of the most practical ways to teach about percentages is to use the real-life example of "sale" or "discount" pricing. This presentation poses many of these type of problems for young mathematicians who are trying to master the technique. There are problems where they must calculate interest on a purchase and the commission earned by a salesman who makes a percentage on each sale. Very good!
Real-Life Problems, Working with Decimals #2
It's all about decimals in these word problems, which have scholars apply math to scenarios they will likely come across later in life. Working with multi-digit numbers and decimals to the hundredths place, learners must determine the operation for each of six problems and show their work in the designated place. They use subtraction, multiplication, and division to solve these, and can reference the two examples if they need to.
Converting Decimal Representations of Rational Numbers to Fraction Representations
A rational number is a ratio of two integers. Discuss with your class how to convert the rational numbers of repeating decimals to fractions. A good commentary on letting x equal the repeating decimal and multiplying each side of such equation by a power of 10 or 10r, where r is the repeating segment.
Multiplying Decimals Lessons
By using visual aids, and explaining mathematical language students can get a concrete grasp of how to multiply decimals.
It's All the Same! Comparing Fractions, Decimals and Percent
In this math worksheet, 3rd graders compare fractions, decimals, and percents. Students convert fractions to decimals, decimals to percents, fractions to percents, percents to fractions, percents to decimals, and decimals to fractions.
Dividing Decimals 2.1
Occasionally, in mathematics, there are "short cuts" one can take. Sal explains a quick way to divide decimals numbers. He demonstrates that in certain cases, simply shifting the decimal point to the left will result in a correct answer.
Multiplication of Decimals
In this multiplication of decimals worksheet, students solve and complete 33 various types of problems. First, they find the missing number for each sum marked. Then, students use Egyptian multiplication to find the sums for each problem. They also write out the Roman numerals for the numbers shown.
Decimals, Percents and Fractions
Sixth graders convert decimals and percents. They observe a teacher lead demonstration of converting decimals to percents and percents to decimals. Students practice what they have seen.
MULTIPLYING AND DIVIDING FRACTIONS, TEACHER'S GUIDE (7, SAXON MATH, Pp. 25-28)
In this teacher's guide to the multiplying and dividing fractions worksheet, learners learn that fractions are converted to decimals on a calculator. Students have guided practice multiplying a fraction by a whole number; multiplying a fraction by a fraction; and dividing fractions and mixed numbers, all on a calculator.