What is 9/10 + 3/9?
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This is how we add
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Step 1Can you add yet? Nope! The denominators don't match. We need a common denominator. So next we take both denominators and multiply them. Next, take each numerator and multiply it by the denominator of the other term. So, we multiply 9 by 9, and get 81, then we multiply 10 by 9 and get 90. Now for the second term. You multiply 3 by 10, and get 30, then multiply 10 by 9 and get 90. We now have a new problem, that looks like this:
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Step 2Since our denominators match, we can add the numerators. 81 + 30 = 111 That gives us the sum, which is
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Step 3Now, do we need to simplify this fraction? First, we attempt to divide it by 2... Nope. Try the next prime number, 3... Are both the numerator and the denominator evenly divisible by 3? Yes! So we reduce it:
Now, try the same number again. Nope. Try the next prime number, 5... Nope. Try the next prime number, 7... Nope. Try the next prime number, 11... Nope. Try the next prime number, 13... Nope. Try the next prime number, 17... Nope. Try the next prime number, 19... Nope. Try the next prime number, 23... Nope. Try the next prime number, 29... Nope. Try the next prime number, 31... No good. 31 is larger than 30. So we're done reducing. Congratulations! Here's your final answer to 9/10 + 3/9
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