А) 7 11\50 + 0.78 - 4 7\8 = 7 + 11/50 + 0.78 - 4 - 7/8= 7 + 0.22 + 0.78 - 4 - 0.875= 7 + 1 - 4 - 0.875= 8 - 4 - 0.875= 4 - 0.875= 3.125
Б) 5\6 + 1 3\4 + 1.25 = 5/6 + 1 + 3/4 + 1.25= 5/6 + 1 + 9/12 + 1.25= 10/12 + 1 + 9/12 + 1.25= 19/12 + 2.25= 1.58 + 2.25= 3.83
А) 7 11\50 + 0.78 - 4 7\8 = 7 + 11/50 + 0.78 - 4 - 7/8
= 7 + 0.22 + 0.78 - 4 - 0.875
= 7 + 1 - 4 - 0.875
= 8 - 4 - 0.875
= 4 - 0.875
= 3.125
Б) 5\6 + 1 3\4 + 1.25 = 5/6 + 1 + 3/4 + 1.25
= 5/6 + 1 + 9/12 + 1.25
= 10/12 + 1 + 9/12 + 1.25
= 19/12 + 2.25
= 1.58 + 2.25
= 3.83