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Grade 2 Math 9.5, Understanding place value (three-digits)
By Joann's School
How each digit in a three-digit number has a different value as hundreds, tens, or ones. Expanded form of a three-digit number. Identifying the value of a digit in a three-digit number. Counting by hundreds, then writing the missing number by using a pattern. Writing a number represented by models of hundreds, tens, and ones
Multiplying and dividing with significant figures | Decimals | Pre-Algebra | Khan Academy
By Khan Academy
This video takes us through some real world examples of when we should use significant figures when multiplying and dividing. An important note: never consider significant figures until you have reached your FINAL ANSWER. Otherwise, rounding too early will produce more uncertainty about your solution.
Lattice Multiplication with Decimals
By YourMathGal
Shows an alternate way to multiply decimals using a lattice. Youtube videos by Julie Harland are organized at http://YourMathGal.com lattice3dec1.mp4For more great math videos visit: www.youtube.com/user/videosbyjulieharland/videos . Aligned to Common Core State Standard: 5.NBT.7
Using Cross Multiplication to Solve Proportions
By Davitily
The instructor uses an electronic chalkboard to demonstrate how to use cross multiplication to solve for a missing variable in a proportion. One example is modeled using a step by step approach.
ALL OF GRADE 9 MATH IN 60 MINUTES!!! (exam review part 3)
By Lumos Learning
Here is a great exam review video reviewing all of the main concepts you would have learned in the MPM1D grade 9 academic math course. The video is divided in to 3 parts. This is part 3: Geometry. In this video you will review parallel line theorems, pythagorean theorem, and volume/surface area of three dimensional shapes.
Grade 4 Math - Compare Decimals
By Lumos Learning
Using the Lumos Study Programs, parents and educators can reinforce the classroom learning experience for children and help them succeed at school and on the standardized tests. Lumos books, dvd, eLearning and tutoring are used by leading schools, libraries and thousands of parents to supplement classroom learning and improve student achievement in the standardized tests.
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More involved multiplying decimals example
By Khan Academy
Sometimes multiplying really small decimals (with all those zeros!) can be a little intimidating. Watch as we show you a handy trick to simplify these problems and solve them.
Volume word problems with fractions and decimals
By Khan Academy
Sal explains how to find the value of a rectangular prism fish tank that fractional side lengths.
Percent to Decimal - YourTeacher.com - Math Help
By yourteachermathhelp
For a complete lesson on converting percents to decimals go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson students learn to write percents as decimals and decimals as percents. For example to write 82% as a decimal think of 82% as 82/100 and remember that dividing by 100 moves the decimal point two places to the left to get 0.82. So 82% can be written as the decimal 0.82. Since a percent can be written as a decimal by moving the decimal point two places to the left a decimal can be written as a percent by moving the decimal point two places to the right. For example to write 0.4 as a percent move the decimal point two places to the right to get 40. So 0.4 can be written as 40%
Learn Graphing, Coordinate Plane, Points, Lines, X-Axis, Y-Axis & Ordered Pairs - [5-7-1]
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
MathCraft: Place Value Divsion Common Core 4 NBT A1
By James Pike
Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right