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01.08.2019 •
Mathematics
Which one is least to greatest? explain how you know. ( - = negative) a -1/5, -2/3, 2, 0.4 b 2, -2/3, 0.4, - 1/5 c -2/3,0.4, -1/5, 2 d -2/3, -1/5, 0.4, 2
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Ответ:
Let's get all the numbers mentioned here, -2/3, -1/5, 0.4, and 2.
Firstly, decimals:
-2/3 = -0.666...
-1/5 = -0.2
Secondly, and slightly more complicated, fractions:
0.4 = 4/10
2 = 20/10 (for the sake of using the same denominator)
Now we need to find a common denominator for all of the fractions
The lowest common multiple of 3 5 and 10 is 30, so lets put them all over 30:
-1/5 = -6/30
-2/3 = -20/30
4/10 = 12/30
2 = 60/30
Now we can see the numbers more clearly, which shows us the the correct answer is D
Ответ: