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How is the decimal (0.444\ldots) written in bar notation?

Answer and explanation

Correct answer: (0.\overline{4})

The direct answer is A: 0.\overline{4}. The decimal has 4 repeating forever: 0.444444... The bar is placed exactly above the digit or group that repeats. Here the repeating group is only 4, so the notation is 0.\overline{4}. Option A is correct because it shows one bar over 4. Option B, 0.4, means a terminating decimal and does not show that 4 continues forever. Option C places the bar over 44 but leaves another 4 outside it, which does not represent the given repeating pattern correctly. Option D, 4.\overline{0}, is a number greater than 4 and is not the same value. Remember: put the bar over the smallest complete repeating block.

Related tags

Number-SystemsDecimal-RepresentationBar-Notation

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