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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
One-step multiplication and division equations with fractions and decimals
By Khan Academy
Learn how to solve equations in one step by multiplying or dividing a number from both sides.������������These problems involve decimals and fractions.
One-step equations with multiplication and division
By Khan Academy
Let's get a conceptual understanding of why one needs to divide both sides of an equation to solve for a variable.
One-step equations with multiplication and division
By Khan Academy
Let's ease into this, shall we? Here's an introduction to basic algebraic equations of the form ax=b. Remember that you can check to see if you have the right answer by substituting it for the variable!
One-step equations with multiplication and division
By Khan Academy
Remember that what you do to one side, you have to do to the other. Will you multiply or divide both sides to dump the fraction, x/a? Let's do it together.
One-step equations with multiplication and division
By Khan Academy
This equation can be simplified through a single step to solve for the variable. Can you help?
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.
Multiplying and Dividing Decimals | 7.NS.A.2c | 7th Grade Math
By ParksMath | Todd Parks
ParksMath explains how to multiply and divide decimals numbers without the use of a calculator. Understanding how to change a decimal number so that it is an integer, makes multiplying and dividing decimals much easier. This quick tutorial will give you thee tools that you need to find the product or quotient of any decimal number.
Multiplying decimals 2
By Khan Academy
We want you to develop an intuition about how to work with decimals. Understanding how you can rewrite decimals by considering the place value will help you multiply!
Multiplying decimals 1
By Khan Academy
We're multiplying decimals again, but this time answering a common question: what's the cost of filling up the car tank?
Multiplying decimals 2
By Khan Academy
Multiplying decimals? Try multiplying without the decimals first, them add them back in. We'll show you.
Multiplying decimals 2
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.
Multiplying decimals 1
By Khan Academy
Multiplying decimals can be confusing because there's always the question as to where the decimals goes in the answer. We're about to show you so you'll never have to question it again!
Multiplying decimals 3
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.
Multiplying decimals 3
By Khan Academy
Multiplying decimals? Try multiplying without the decimals first, them add them back in. We'll show you.
One-step addition and subtraction equations with fractions and decimals
By Khan Academy
Some quick examples to practice solving a variety of one step equations. All 4 operations (add, subtract, multiple, divide) are paired with variables.