Вычислите 1) (8-4 3/11)+2 8/11 2) 11 1/7 - (4 4/7 - вопрос №4123639184311281121117447367 от Pizetiv4ik 10.01.2020 00:06

Question

Математика: Вычислите 1) (8-4 3/11)+2 8/11 2) 11 1/7 - (4 4/7 + 3 6/7)

Pizetiv4ik · Answer

8 - 4 3/11 = 8/1 - 47/11 = (8 × 11 - 47 × 1)/11 = (88 - 47)/11 = 41/11 = 3 8/11
3 8/11 + 2 8/11 = 41/11 + 30/11 = (41 + 30)/11 = 71/11 = 6 5/11
ответ 6 5/11
4 4/7 + 3 6/7 = 32/7 + 27/7 = (32 + 27)/7 = 59/7 = 8 3/7
11 1/7 - 8 3/7 = 78/7 - 59/7 = (78 - 59)/7 = 19/7 = 2 5/7
ответ 2 5/7