![]() ![]() We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.įor free. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We tackle math, science, computer programming, history, art history, economics, and more. The fun must not stop! (Content was selected for this grade level based on a typical curriculum in the United States.)Ībout Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. As always, we'll round this out with a healthy dose of applied word problems and explorations of number patterns and properties (including the ideas of factors, multiples and prime numbers). 0.375 3 8 0.45 9 20 1 4 or 2 8 of the grid is 25 squares and 1 8 of One column is 1 10 of the grid, so half a grid is 12 1 2 squares, so 37 1 2 squares. One way to shade each grid is shown below. Then write the decimal as a fraction in simplest terms. Some of the foundational concepts of geometry (like lines, rays and angles) also get introduced. Represent each decimal by shading the grid. On other fronts, you'll learn how to convert between different units (which is super important when comparing the size and speed of robot unicorns in different countries) and continue your journey thinking about various shapes in two dimensions. You'll also see how they relate to decimals. Now you'll start adding, subtracting, multiplying, and comparing them. ![]() In 3rd grade you learned what a fraction is. You'll also discover that you sometimes have something left over (called a "remainder") when you divide. Not only will you be a multi-digit addition and subtraction rockstar, but you'll extend the multiplication and division that you started in 3rd grade to several digits. Grade 4th on Khan Academy: 4th grade is the time to start really fine-tuning your arithmetic skills. Practice this lesson yourself on right now: And we're done.Deepen your understanding of decimal numbers by thinking about grid diagrams. And then if you were to do a percent, well, this is 44 per 100, or 44/100, but even here I like lookĪt it as 44 per 100 or 44%. Now, what about as a decimal? Well, 44/100, you could say, well, you have your ones place, and then this is the same thing. We could divide the numeratorĪnd the denominator by four, in which case you would get 11 over 25. Row is 10, 20, 30, 40, and then one, two, three, four. And how many of them are there? Well, let's see, this ![]() This is a 10 by 10 grid, so there's 100 equal sections here. So see if you can represent this as the part that's shaded Or another way of thinking about it, 60 per, instead of 100 you could say cent. Multiply the numerator and the denominator by 10, that's the same thing as 60 per 100. Now, what about a percentage? Well, percent means per 100, so one way to thinkĪbout it is six over 10 is the same thing as what per 100? That is equal to, if we And so we have 6/10, so you could just put it right over there. What decimal would it be? Pause the video again and If you divide the numeratorĪnd the denominator by two, that's the same thing as three over five. So the blue represents 6/10 of a whole, or it represents, youĬould just say, 6/10. Nine, 10 equal sections, and six of them are filled in. Into one, two, three, four, five, six, seven, eight, Well, let's first thinkĪbout it as a fraction. Part that is shaded in blue as a fraction, as a decimal, and as a percent. What we're going to do in this video is try to represent the Assume that this entire square represents a whole. ![]()
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