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Do 9.09 and 1.01 add up to 10?

Updated: 8/20/2019
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12y ago

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no, they add to 10.10

To add decimal numbers you add like any other problem and bring down the decimal point

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12y ago
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Q: Do 9.09 and 1.01 add up to 10?
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What two numbers multiply to get -1 and add up to 20?

The numbers are (10- square root of 101) and (10+square root of 101)


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499 and 101.


Can two prime numbers add up to 101?

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Is there a formula to add up all the numbers from 1 to 100?

yes. 1+ 100= 101 2+99=101 3+98=101 4+97=101 5+96=101 and so on. then its 101 times 50= 5050


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If you add the first and the last number, you have a sum of 101. The second number from the left and the second number from the right will also add up to 101. If you continue in this way, you get 50 pairs of numbers, each of which has a sum of 101, so the final result is 50 x 101.


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You could add them up one by one (a spreadsheet will help with this). Or you can use the formula for the sum of an arithmetic series. -------------------------------------- Answer = 101/2 (0 + 100) = 101 x 50 = 5050


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Instead of adding each digit in turn, acknowledge that there are 100 numbers to add, and then multiply that by the average of 1 and 100.Ie. 100×(1+100)÷2=100×101;÷2100×101;÷2=50×101=5050So, in short, the answer is: 5050