4_3/14 + 1/2 - 2_3/4 = 1_27/28
1 2
1) 4_3/14 + 1/2 = 4_3/14 + 7/14 = 4_10/14
2) 4_10/14 -2_3/4 = 4_20/28 - 2_21/28 = 3_48/28 - 2_21/28 = 1_27/28
4_3/14 + 1/2 - 2_3/4 = 1_27/28
1 2
1) 4_3/14 + 1/2 = 4_3/14 + 7/14 = 4_10/14
2) 4_10/14 -2_3/4 = 4_20/28 - 2_21/28 = 3_48/28 - 2_21/28 = 1_27/28
Держи)))))))))))