Пошаговое объяснение:
|-5|=5; |-7|=7; 5<7; |-5|<|-7|
|8|=8; |24|=24; 8<24; |8|<|24|
|6|=6; |-5|=5; 6>5; |6|>|-5|
|-17|=17; |17|=17; 17=17; |-17|=|17|
|-9|=9; |3|=3; 9>3; |-9|>|3|
|-25|=25; |0|=0; 25>0; |-25|>|0|
Весь путь автомобиля примем за единицу (целое).
1) 1 - 5/12 = 12/12 - 5/12 = 7/12 - оставшаяся часть пути;
2) 15/28 · 7/12 = (5·1)/(4·4) = 5/16 - часть пути, пройденного за второй час;
3) 7/12 - 5/16 = 28/48 - 15/48 = 13/48 - часть пути, пройденного за третий час;
4) 5/12 - 13/48 = 20/48 - 13/48 = 7/48 - разница, равная 42 км;
5) 42 : 7/48 = 42 · 48/7 = 6 · 48 = 288 (км) - весь путь автомобиля.
ответ: 288 км.
Проверка:
1) 5/12 · 288 = 120 км - пройдено за 1-й час;
2) 15/28 · (288 - 120) = 90 км - пройдено за 2-й час;
3) 13/48 · 288 = 78 км - пройдено за 3-й час;
4) 120 - 78 = 42 км - на столько меньше пройдено за 3-й час.
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А) |-5| и |-7| = 5 < 7
б) |8 |<|24|
В) |-9| и |3| = 9>3
г) |6| >|-5|
д) |-17| и |17| = 17=17
е) |-25| и |0|= 25> 0