An Introduction to Thousandths

Learn how to add two mixed numbers with unlike denominators

Learn how to add and subtract mixed numbers. Mixed numbers are numbers with two parts: the whole number part and the fraction part. Mixed numbers are ways to...

Using Known Number Facts to Find Related Facts

Square and Cube Numbers

Multiplying and dividing decimals by 10, 100, 1000

Multiplying and dividing decimals by 10, 100, 1000

Multiplying: 2 digit numbers | Multiplication and division | 4th grade | Khan Academy

The trick here to remember your place value as you multiply and then add the numbers. We'll demonstrate and make it perfectly clear! Practice this lesson you...

Multiplying: 2 digits times 1 digit (with carrying) | Arithmetic | Khan Academy

Subtracting with regrouping (borrowing) | Early Math | Khan Academy

Learn how to subtract 23 from 65 by thinking about tens and ones. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/mat...

Adding three digit numbers with regrouping | Addition and subtraction | Arithmetic | Khan Academy

In the old days 'regrouping' was known as "carrying." It's the same idea now as then: moving the tens (or hundreds or thousands) over to the next column. Pra...