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Video instructions and help with filling out and completing What Form 8815 Subtract

Instructions and Help about What Form 8815 Subtract

In this lesson, we are going to focus on adding and subtracting fractions. Let's start with an example: 3/5 plus 4/7. To add these two fractions, we need to find a common denominator. We can do this by multiplying the denominators, which gives us 35. Next, we multiply the numerators: 3 times 7 is 21. We also multiply 5 times 4, which is 20. Adding 21 and 20 gives us 41. So the answer is 41/35. Now let's try another example: 7/8 minus 2/9. Again, we need a common denominator. Multiplying 8 and 9 gives us 72. Next, we calculate 7 times 9, which is 63, and 8 times 2, which is 16. Subtracting 16 from 63 gives us 47. Since 47 is not divisible by 2 or 3, this is our final answer: 47/72. Now, what if we wanted to add or subtract three fractions instead of two? Let's say we have 3/4 plus 5/3 minus 7/2. In this case, all the denominators are different, so we need to find a common denominator. We can find the least common multiple (LCM) by listing the multiples of each denominator. The LCM for 2, 3, and 4 is 12. We can also use a larger multiple like 24, but we would need to simplify at the end. Since we know the LCM is 12, we can multiply each fraction to get a denominator of 12. For the first fraction, we multiply the numerator and denominator by 3 (3 times 4 is 12). For the second fraction, we use 4 (4 times 3 is 12). And for the third fraction, we use 6 (6 times 2 is 12). Now, the numerators become 9 (3 times 3), 20 (4 times 5), and 42 (7 times 6). We can now combine the numerators: 9 plus 20...