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Multiplying and Dividing by Powers of 10
By jimbabweiberg
The instructor uses an interactive white board to show that multiplying a decimal by 10 100 1 000 or 10 000 moves the decimal one two three or four places to the right. He displays a calculator to show this as well. He also explains and shows that dividing by a power of 10 moves the decimal place to the left according to the number of zeros in the number you are multiplying by.
Dividing Scientific Notation | MathHelp.com
By MathHelp.com
To multiply numbers that are in written in scientific notation, such as 1.4 x 10 to the -2nd times 5.3 times 10 to the 6th, we first multiply the decimals, in this case 1.4 times 5.3, to get 7.42. Next, we multiply the powers of 10, in this case 10 to the -2nd times 10 to the 6th. Notice that we’re multiplying two powers that have like bases, so we add the exponents and leave the base the same, to get 10 to the -2 + 6, or 10 to the 4th. So we have 7.42 times 10 to the 4th. Finally, we’re asked to write our answer in scientific notation. Notice, however, that 7.42 times 10 to the -4th is already written in scientific notation, because we have a decimal between 1 and 10 that is multiplied by a power of 10. So we have our answer.
[5.NBT.2-2.0] Multiplying/Dividing by 10 - Common Core Standard
By Front Row
Discover more Common Core Math at https://www.frontrowed.com Explain patterns in the placement of the decimal point when a decimal is multiplied by a power of 10, use whole-number exponents to denote powers of 10 Front Row is a free, adaptive, Common Core aligned math program for teachers and students in kindergarten through eighth grade. Front Row allows students to practice math at their own pace - learning advanced concepts when they're ready and receiving remediation when they struggle. Front Row provides teachers with access to a detailed data dashboard and weekly email reports that show which standards are causing students difficulty, what small groups can be formed for interventions, and how their students are progressing in math.Discover more Common Core Math at https://www.frontrowed.com
[5.NBT.2-3.0] Multiplying/Dividing by 10 - Common Core Standard
By Front Row
Discover more Common Core Math at https://www.frontrowed.comExplain patterns in the placement of the decimal point when a decimal is divided by a power of 10, use whole-number exponents to denote powers of 10Front Row is a free, adaptive, Common Core aligned math program for teachers and students in kindergarten through eighth grade. Front Row allows students to practice math at their own pace - learning advanced concepts when they're ready and receiving remediation when they struggle. Front Row provides teachers with access to a detailed data dashboard and weekly email reports that show which standards are causing students difficulty, what small groups can be formed for interventions, and how their students are progressing in math.Discover more Common Core Math at https://www.frontrowed.com
[5.NBT.2-1.0] Multiplying/Dividing by 10 - Common Core Standard - Practice Problem
By Front Row
Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, use whole-number exponents to denote powers of 10
Lesson 1 - Multiply Whole Numbers By Fractions (5th Grade Math)
By Lumos Learning
This is just a few minutes of a complete course. Get all lessons & more subjects at: http://www.MathTutorDVD.com. In this lesson the student will learn how to multiply a whole number by a fraction and simplify the result.
