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Khan Academy
Khan Academy is a nonprofit that offers personalized learning for students and teachers in math, science, history, and more. Learn how Khanmigo, powered by GPT-4, can enhance your teaching and learning experience with Khan Academy.
Add and subtract fractions | 4th grade | Math | Khan Academy
Adding 3 eighths and 2 eighths is as easy as adding 3 stars and 2 stars. We'll add and subtract fractions with like denominators. Then we'll check out a special set of fractions, called decimal fractions. We'll even collect and interpret measurement data with fractions.
Unit 2: Addition, subtraction, and estimation - Khan Academy
Addition and subtraction are key skills for any math whiz. In this unit, you'll sharpen those skills by working with multi-digit numbers. You'll also learn how to round and estimate, so you can quickly make calculations even when you don't have a calculator handy.
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Do you like breaking things apart? Then you're going to love learning about division! We'll use place value, area models, and estimation techniques to make dividing by 1-digit numbers a breeze. In this unit, you will even get the inside scoop on what to do when there's a pesky remainder left over.
Unit 6: Factors, multiples and patterns - Khan Academy
In this unit, you'll learn all about how numbers can be broken down into different factor pairs. You'll also get to investigate which numbers are prime and which are composite. But that's not all! You'll also get to explore how shapes and numbers can be arranged in different patterns!
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Let's build a solid foundation of multiplication so we will be ready to multipy 1 and 2-digit numbers in fourth grade! In this unit, we will practice using equal groups, number lines, groups of objects, and array to multipy.
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