Ответ:
Пошаговое объяснение:
2 : 3/5 + 1,8 * 2/3 = 4 8/15
1) 2 : 3/5 = 2/1 * 5/3 = 10/3
2) 1,8 * 2/3 = 18/10 * 2/3 = 9/5 * 2/3 = 3/5 * 2/1 = 6/5
3) 10/3 + 6/5 = 50/15 + 18/15 = 68/15 = 4 8/15
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1 : 1,6 - 1/16 = 9/16
1) 1 : 16/10 = 1 * 10/16 = 1 * 5/8 = 5/8
2) 5/8 - 1/16 = 10/16 - 1/16 = 9/16