8/30/2023 0 Comments Whole numbers examples![]() ![]() Just like in our earlier example, the denominator stays the same. In this example, the numerators are 7 and 2.ħ plus 2 equals 9, so we'll write that to the right of the numerators. Just like before, we're only going to add the numerators. Let's try another example: 7/10 plus 2/10. So you'll need 4/5 of a cup of oil total to make your cake. The denominators will stay the same, so we'll write 5 on the bottom of our new fraction.ģ/5 plus 1/5 equals 4/5. Make sure to line up the 4 with the numbers you just added. The numerators show the parts we need, so we'll add 3 and 1.ģ plus 1 equals 4. This is because we're finding how many parts we need total. Remember, when we add fractions, we don't add the denominators. Let's continue with our previous example and add these fractions: 3/5 of cup of oil and 1/5 of a cup of oil. ![]() If you can add whole numbers, you're ready to add fractions.Ĭlick through the slideshow to learn how to add fractions. ![]() Now that we know how to write addition problems with fractions, let's practice solving a few. Try setting up these addition and subtraction problems with fractions. Now that our example is set up, we're ready to subtract! This is because we want to subtract 1 part from 3 parts. Just like when we added, we'll stack our fractions to keep the numerators lined up. If you use 1/4 of a tank to drive home, how much will you have left? We can subtract these fractions to find out. Let's say you had 3/4 of a tank of gas when you got to work. We'll do the same thing to set up a subtraction example. This will make it easier to add them.Īnd that's all we have to do to set up an addition example with fractions. We can stack the fractions so the numerators are lined up. So we only need to add the numerators of our fractions. We just want to find out how many parts we need total. We don't want to change how many parts make a whole cup ( 5). That's because the bottom numbers, or denominators, show how many parts would make a whole. When you add fractions, you just add the top numbers, or numerators. To see how much oil you'll need total, you can add these fractions together. You also need 1/5 of a cup of oil to grease the pan. Let's imagine that a cake recipe tells you to add 3/5 of a cup of oil to the batter. For example, have you ever walked 1/2 of a mile to work and then walked another 1/2 mile back? Or drained 1/4 of a quart of gas from a gas tank that had 3/4 of a quart in it? You probably didn't think about it at the time, but these are examples of adding and subtracting fractions.Ĭlick through the slideshow to learn how to set up addition and subtraction problems with fractions. In real life, you might need to add or subtract fractions. Fractions show how much you have of something, like 1/2 of a tank of gas or 1/3 of a cup of water. In the previous lessons, you learned that a fraction is part of a whole. en/fractions/comparing-and-reducing-fractions/content/ Adding and subtracting fractions In fact, one of the curious and useful facts that you need to learn about numbers is that any number that ends in five or zero like these ones, is a multiple of five.Lesson 3: Adding and Subtracting Fractions So 10 is a multiple of five and so is 15, and so are 20 and 25. Because all of the numbers down the right side after five, are multiples of five. For example, if we were looking for multiples of five, we could look at a five times table. And if three times five equals 15, then we can say that the product of three and five equals 15.Ī multiple is a number, that is the product of a certain whole number and another whole number. For example, the product of two and 10 is 20. Product, is the answer found when numbers are multiplied together. The numbers one, two, three and six are all factors of six. So, the numbers one and six are also factors of six. But two isn’t a factor of seven, and neither is three, because if we divide seven by two or three we get one left over. ![]() So the numbers two and three, are factors of six. For example, the number six can be divided by two, exactly three times or in other words, two times three equals six. Any whole number that can divide exactly into another number, with nothing left over is a Factor. I’ve probably already used a few words, that you are unfamiliar with. ![]()
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