А)(2 1/2 0,8 - 5 2/3 : 5,1) : 2/3 - 1/3= (5/2 0.8 - 17/3 / 5.1) / 2/3 - 1/3= (4/5 - 17/3 / 5.1) / 2/3 - 1/3= (0.8 - 17/3 / 5.1) / 2/3 - 1/3= (0.8 - 17/3 * 10 / 51) / 2/3 - 1/3= (0.8 - 170/51) / 2/3 - 1/3= (0.8 - 3.333) / 2/3 - 1/3= (-2.533) / (2/3) - 1/3= (-2.533) / (2/3) - 1/3= -3.8 - 1/3= -4.133
Б)(-34 28 - 34 -98) / 35= (-952 + 3332) / 35= 2380 / 35= 68
А)
(2 1/2 0,8 - 5 2/3 : 5,1) : 2/3 - 1/3
= (5/2 0.8 - 17/3 / 5.1) / 2/3 - 1/3
= (4/5 - 17/3 / 5.1) / 2/3 - 1/3
= (0.8 - 17/3 / 5.1) / 2/3 - 1/3
= (0.8 - 17/3 * 10 / 51) / 2/3 - 1/3
= (0.8 - 170/51) / 2/3 - 1/3
= (0.8 - 3.333) / 2/3 - 1/3
= (-2.533) / (2/3) - 1/3
= (-2.533) / (2/3) - 1/3
= -3.8 - 1/3
= -4.133
Б)
(-34 28 - 34 -98) / 35
= (-952 + 3332) / 35
= 2380 / 35
= 68