Question

Выполните сложения
а ) - 543+458=
б) 0.54+(-0.83)=
в) - 2 5/7 +3=
г) - 2/9 +( -5/6)=
д) 2 9/11 + ( - 3 7/22)=

Answer 1

а) -543 + 458 = -85

б) 0,54 + (-0,83) = 0,54 - 0,83 = -0,29

в) - 2 5/7 + 3 = 3 - 2 5/7 = 2 7/7 - 2 5/7 = 2/7

г) -2/9 + (-5/6) = -2/9 - 5/6 = -8/36 - 30/36 = -38/36 = -1 2/36 = -1 1/18

д) 2 9/11 + (-3 7/22) = 2 9/11 - 3 7/22 = 2 18/22 - 3 7/22 =

= 2 18/22 - 2 29/22 = -11/22 = -1/2 = -0,5