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kiraflower
@kiraflower
July 2022
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помогите решить примеры (7/8-1/4)+(11/12-6/8) И (4/7+1/3)-(7/8-4/7)
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ValyaStrikalo
В процессе решения я домножаю дроби до одинакового знаменателя:
(7/8-1/4) + (11/12-6/8) = (7/8-2/8) + (22/24-18/24) = 5/8 + 4/24 = 15/24 + 4/24 = 19/24.
(4/7+1/3) - (7/8-4/7) = (12/21+7/21) - (49/56-32/56) = 19/21 - 17/56 = 1064/1176 - 357/1176 = 707/1176
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ValyaStrikalo
Возможно, второй пример можно решить другим способом, но я его не нашла.
KurlikPtashka
7/8-14=5/8
11/12-6/8=4/24=1/6
5/8+1/6=1
И
4/7+1/3=19/21
7/8-4/7=35/56=5/8
19/21-5/8=47/168
Очень мало балов даёшь((((
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Answers & Comments
(7/8-1/4) + (11/12-6/8) = (7/8-2/8) + (22/24-18/24) = 5/8 + 4/24 = 15/24 + 4/24 = 19/24.
(4/7+1/3) - (7/8-4/7) = (12/21+7/21) - (49/56-32/56) = 19/21 - 17/56 = 1064/1176 - 357/1176 = 707/1176
11/12-6/8=4/24=1/6
5/8+1/6=1
И
4/7+1/3=19/21
7/8-4/7=35/56=5/8
19/21-5/8=47/168
Очень мало балов даёшь((((