ПОМОГИТЕ ПЖ СРОЧНО ДО КОНЦА ЭКЗАМЕНА ОСТАЛОСЬ 15 МИНУТ.... 3,4,5. С Решением Если без него Я дам нарушение модераторам
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Ответы
Ответ:
№ 3
1) 3/8 * 4 = 3 * 4/ 8 = 12/8 = 1 4/8 = 1/2
2) 16 * 17/24 = 16 * 17 /24 = 272 / 24 = 11 8/24 = 11 1/3
3) 2/51 * 85 = 85 * 2 /51 = 170/51 = 3 17/51 = 3 1/3
4)5/9 * 18 = 5 * 18 / 9 = 90/9 = 10
5) 25 * 3/35 = 75/35 = 2 5/35 = 2 1/7
6) 35 * 17/105 = 595/105 = 5 70/105 = 5 2/3
7) 11/18 * 9 = 11*9/18 = 99/18 = 11/2 = 5 1/2
8) 19/82 * 123 = 19 * 123 / 82 = 2337 / 82 = 28 41/82 = 28 1/2
9) 220 * 17/660 = 220 * 17/660 = 3740/660 = 5 440/660 = 5 2/3
10) 105 * 13/42 = 1365/42 = 32 21/42 = 32 1/2
11) Не вижу второе число, но, если это 50, то
4/75 * 50 = 200/75 = 2 50/75 = 2 2/3
12) Тоже не вижу( Если последнее число - 129, то
1/43 * 129 = 129/43 = 3
№4
1) 28 * 9/14 = 252/14 = 18
2) 42 11/28 = 462/28 = 16 14/28 = 16 1/2
3) 23/45 * 18 = 23*18/45 = 414/45 = 9 9/45 = 9 1/5
4) 5/18 * 27 = 5 * 27/18 = 135/18 = 15/2 = 7 1/2
5) 11/25 * 7/8 * 100=77/200*100 = 7700/200 = 38 1/2 (38,5)
11/25 * 7/8 = 11*7 = 77
25*8 200
6) 52 * 6/13 * 3/8 = 9
6/13 * 3/8 = 6*3 = 9 = 9/52
13*8 52
52* 9/52 = 9
№5
1) 0,25 * 4/7 = 1/4 * 4/7 = 4 = 1/7
4*7
2)7/8 * 0,75 = 7/8 * 3/4 = 7*3 = 21/32
8*4
3) 0,375 * 4/9 = 3/8 * 4/9 = 3*4 = 4 = 1/6
8*9 8*3
4) 0,75 * 2/3 = 3/4 * 2/3 = 3*2 = 2/4 = 1/2
4*3