Предмет: Математика, автор: daniil30122005

помогите:приведите дроби к общему знаменателю:
пять тридцать шестых и семь пятьдесят четвёртых
девять тридцать пятых и одинадцать сорок вторых
четыре сорок девятых и пять шестьдесят третих

Ответы

Автор ответа: lenapanova
0
5/36  и  7/54   ------->  15/108   и  14/108
36 = 2*2*3*3 
54 = 2*3*3*3
НОК = 3³ * 2² = 27 * 4 = 108

9/35  и  11/42  ----->   54/210  и  55/210
35 = 5*7
42 = 2*3*7
НОК = 2 * 3 * 5 * 7 = 210

4/49  и 5/63  -------->   36/441  и   35/441
49 = 7*7
63 = 3*3*7
НОК = 3² * 7² = 441
Автор ответа: daniil30122005
0
а я этого не понимаю
Автор ответа: lenapanova
0
Я написала подробно как найти НОК(общий знаменатель) , если вы этого не проходили, тогда не знаю как вы его находите.
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