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10 December, 07:09

Find a rational number that is between 7.7 and 7.9. Explain why it is rational.

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  1. 10 December, 07:32
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    The average between any two rational numbers is also rational.

    (7.7 + 7.9) / 2 = 7.8

    7.8 is rational because it can be written as a fraction with integer numerator and denominator (39/5) and it is also a terminating decimal.
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