Найдите сумму чисел 5 3/7 и 3 4/21: 1)2 5/21; 2)8 - вопрос №750083553734211252128133814481321 от lera111222 27.12.2021 05:23

Question

Математика: Найдите сумму чисел 5 3/7 и 3 4/21: 1)2 5/21; 2)8 1/3; 3)8 1/4; 4)8 13/21

lera111222 · Answer

5 3/7 + 3 4/21 /1 = 38/7 + 67/21 = 114/21 + 67/21 = 181/21 = 8 13/21
5 3/7 + 2 5/21 = 38/7 + 47/21 = 114/21 + 47/21 = 161/21 = 7 14/21 = 7 2/3
5 3/7 + 8 1/3 = 38/7 + 25/3 = 114/21 + 175/21 = 289/21 = 13 16/21
5 3/7 + 8 1/4 = 38/7 + 33/4 = 152/28 + 231/28 = 383/28 = 13 19/28
5 3/7 + 8 13/21 = 38/7 + 181/21 = 114/21 + 181/21 = 295/21 = 14 1/21