Найдите приближённо значения выражений a+b; a-b, округляя числа a и b до десятых: А) a=11,32; b=0,1 Б) a=4,2; b=1,(1)

А) a = 11,32 = 11,3; b = 0,1; a + b = 11.3 + 0.1 = 11.4 ; a - b = 11.3 - 0.1 = 11.2 ; Б ) a = 4,2; b = 1,(1) = 1.1; a + b = 4.2 + 1.1 = 5 + 0.2 + 0.1 = 5 + 0.3 = 5.3 ; a - b = 4.2 - 1.1 = 3 + 0.1 = 3.1 ; В) a = 0,(3) = 0.3; b = - 2,323 = - 2.3; a + b = 0.3 + ( - 2.3 ) = 0.3 - 2.3 = - 2; a - b = 0.3 - ( - 2.3 ) = 0.3 + 2.3 = 2.6 ; Г) a = 0,(6) = 0.7 ; b = 0,(2) = 0.2 ; a + b = 0.7 + 0.2 = 0.9 ; a - b = 0.7 - 0.2 = 0.5 ; Д) a =0,(17) = 0.2; b=0,(81) = 0.8 ; a + b = 0.2 + 0.8 = 1 ; a - b = 0.2 - 0.8 = - 0.6 ; Е) a = 0,(08) = 0.1; b=0,(04) = 0.0 = 0; a + b = 0.1 + 0 = 0.1 ; a - b = 0.1 - 0 = 0.1.