(4 7/8 + 2 5/ 1/8 - 3 3/8) позязя с: - вопрос №48446864782518338 от Nika5332 17.01.2020 01:15

Question

Математика: (4 7/8 + 2 5/ 1/8 - 3 3/8) позязя с:

Nika5332 · Answer

1) 4 7/8 + 2 5/8 = 39/8 + 21/8 = (39 + 21)/8 = 60/8 = 15/2 = 7 1/2
2) 5 1/8 - 3 3/8 = 41/8 - 27/8 = (41 - 27)/8 = 14/8 = 7/4 = 1 3/4
3) 7 1/2 - 1 3/4 = 15/2 - 7/4 =(15 × 2 - 7 × 1)/4 = 30 / - 7/4 = 23/4 = 5 3/4
ответ 5 3/4