Вычислить: 1/6+1/8, 5/8-1/3, 2/3+3/10, 11/12-3/8, - вопрос №6635627161858132331011123834271237293 от Dimitriy2281 05.12.2020 04:13

Question

Математика: Вычислить: 1/6+1/8, 5/8-1/3, 2/3+3/10, 11/12-3/8, 3/4-2/7, 1/2+3/7, 2/9+3/7, 8/9-1/2.

Dimitriy2281 · Answer

А) 3 5/16 + 1/4 - 2 1/16 = 3 5/16 - 2 1/16 + 1/4 = 1 1/2
1) 3 5/16 - 2 1/16 = 1 4/16 = 1 1/4
2) 1 1/4 + 1/4 = 1 2/4 = 1 1/2

б) 1/8 + 2 3/5 + 2 7/8 = 1/8 + 2 7/8 + 2 3/5 = 5 3/5
1) 1/8 + 2 7/8 = 2 8/8 = 3
2) 3 + 2 3/5 = 5 3/5

в) 6 11/12 - 3 1/6 - 1 1/4 = 6 11/12 - (3 1/6 + 1 1/4) = 2 1/2
1) 3 1/6 + 1 1/4 = 3 2/12 + 1 3/12 = 4 5/12
2) 6 11/12 - 4 5/12 = 2 6/12 = 2 1/2

г) 3 7/9 - 1 5/18 + 3 1/2 = 6
1) 3 7/9 - 1 5/18 = 3 14/18 - 1 5/18 = 2 9/18 = 2 1/2
2) 2 1/2 + 3 1/2 = 5 2/2 = 6