Решите срочно пж бду благодарен с решением по дествиям номера 172 и 173
Решите срочно пж бду благодарен с решением по дествиям номера 172 и 173
Гость
Ответ(ы) на вопрос:
Гость№ 172.
а) (- 2 1/6 - 3 1/4) : 2 3/5 + 2/3 * 2 1/4 - 5 1/6 = - 5 3/4
1) - 2 1/6 - 3 1/4 = - 13/6 - 13/4 = - 26/12 - 39/12 = - 65/12
2) - 65/12 : 2 3/5 = - 65/12 : 13/5 = - 65/12 * 5/13 = - 5/12 * 5/1 = - 25/12
3) 2/3 * 2 1/4 = 2/3 * 9/4 = 1/1 * 3/2 = 3/2
4) - 25/12 + 3/2 = - 25/12 + 18/12 = - 7/12
5) - 7/12 - 5 1/6 = - 7/12 - 31/6 = - 7/12 - 62/12 = - 69/12 = - 5 9/12 = - 5 3/4
б) (- 1 1/10 - 7 : (3 1/12 - 1 5/8)) * 1 1/59 = - 6
1) 3 1/12 - 1 5/8 = 37/12 - 13/8 = 74/24 - 39/24 = 35/24
2) 7 : 35/24 = 7 * 24/35 = 1/1 * 24/5 = 24/5
3) - 1 1/10 - 24/5 = - 11/10 - 24/5 = - 11/10 - 48/10 = - 59/10
4) - 59/10 * 1 1/59 = - 59/10 * 60/59 = - 1/1 * 6/1 = - 6
в) (3 1/4 * (- 14 4/5 - 4/15) + 47) : 5 9/10 = - 1/3
1) - 14 4/5 - 4/15 = - 74/5 - 4/15 = - 222/15 - 4/15 = - 226/15
2) 3 1/4 * (- 226/15) = 13/4 * ( - 226/15) = - 2938/60 = = - 48 58/60 = - 48 29/30
3) - 48 29/30 + 47 = - 2938/60 + 47/1 = - 2938/60 + 2820/60 = - 118/60 = - 59/30
4) - 59/30 : 5 9/10 = - 59/30 : 59/10 = - 59/30 * 10/59 = - 1/3 * 1/1 = - 1/3
№ 173.
а) - 3/4 : 5/6 - 2 1/2 * 2/5 + 1 : 1 1/9 = - 1
1) - 3/4 : 5/6 = - 3/4 * 6/5 = - 3/2 * 3/5 = - 9/10
2) 2 1/2 * 2/5 = 5/2 * 2/5 = 1
3) 1 : 1 1/9 = 1 : 10/9 = 1 * 9/10 = 9/10
4) - 9/10 - 1 = - 9/10 - 10/10 = - 19/10
5) - 19/10 + 9/10 = - 10/10 = - 1
б) 2 3/4 : ( - 2/5 + 1 1/2) - ( - 3/4 - 5/6) : 3 1/6 = 3
1) - 2/5 + 1 1/2 = - 2/5 + 3/2 = - 4/10 + 15/10 = 11/10
2) - 3/4 - 5/6 = - 9/12 - 10/12 = - 19/12
3) 2 3/4 : 11/10 = 11/4 : 11/10 = 11/4 * 10/11 = 1/2 * 5/1 = 5/2
4) - 19/12 : 3 1/6 = - 19/12 : 19/6 = - 19/12 * 6/19 = - 1/2 * 1/1 = - 1/2
5) 5/2 - (- 1/2) = 5/2 + 1/2 = 6/2 = 3
в) (- 2/15 - 1 7/12) * 30/103 + 2 : 2 1/4 * 9/32 = - 1/4
1) - 2/15 - 1 7/12 = - 2/15 - 19/12 = - 8/60 - 95/60 = - 103/60
2) - 103/60 * 30/103 = - 1/2 * 1/1 = - 1/2
3) 2 : 2 1/4 = 2/1 : 9/4 = 2/1 * 4/9 = 8/9
4) 8/9 * 9/32 = 1/1 * 1/4 = 1/4
5) - 1/2 + 1/4 = - 2/4 + 1/4 = - 1/4
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