14.53 - 9.8 using mental math?

1 answer:

Maru [420]3 years ago

7 0

4.5 is your answer. u have to 14.3-9.8 and u get 4.5

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i believe the answer is 56:24

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aalyn [17]

Let x = 4.3242424…

Then

10x = 43.242424…

1000x = 4324.242424…

so that we can chop off the fractional part with

1000x - 10x = 4324.242424… - 43.242424…

990x = 4281

x = 4281/990 = 1427/330

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tatiyna

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