Question

обчисли:
а) 1 - 4/17
б) 2 - 2/3
в) 10 - 2/15
г) 15/23 + 12/23

Answer 1

Ответ:

1-4/17=13/17

2-2/3=1 1/3

10-2/15=9 13/15

15/23+12/23=15+23=27/23=1 4/23

Answer 2

$a) \: \frac{1}{1} - \frac{4}{17} = \frac{17 - 4}{17} = \frac{13}{17} \\ \\ d) \: \frac{2}{1} - \frac{2}{3} = \frac{2 \times 3 - 2}{3} = \frac{4}{3} = 1 \frac{1}{3} \\ \\ c) \: \frac{10}{1} - \frac{2}{15} = \frac{10 \times 15 - 2}{15} = \frac{148}{15} = 9 \frac{13}{15} \\ d) \: \frac{15}{23} + \frac{12}{23} = \frac{15 + 12}{23} = \frac{27}{23} = 1 \frac{4}{23}$

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