Выполните действия: 3 3/5: 3 3/5+6/7×2 1/3×1 1/4; - вопрос №335335672131145711335231255147856288 от mrlolik1500 09.07.2021 21:42

Question

Математика: Выполните действия: 3 3/5: 3 3/5+6/7×2 1/3×1 1/4; 5/7×1 13/35+2/3- 1 2/5×5/14

mrlolik1500 · Answer

3 3/5 : 3 3/5 + 6/7 * 2 1/3 * 1 1/4 = 3,5
1)3 3/5 : 3 3/5 = 18/5 * 5/18 = 1
2) 6/7 * 2 1/3 = 6/7 * 7/3 = 2
3) 2 * 1 1/4 = 2/1 * 5/4 = 5/2
4) 1 + 5/2 = 2/2 + 5/2 = 7/2 = 3,5

5/7 * 1 13/35 + 2/3 - 1 2/5 * 5/14 = 1 43/294
1) 5/7 * 1 13/35 = 5/7 * 48/35 = 48/49
2) 1 2/5 * 5/14 = 7/5 * 5/14 = 1/2
3) 48/49 + 2/3 = (144 + 98)/147 = 242/147
4) 242/147 - 1/2 = (484 - 147)/294 = 337/294 = 1 43/294