a) (66 + 48) – 36 – (66 – 36) + 48 – 30 + 48 = 114 - 36 - 30 + 48 - 30 + 48 = 78 - 30 + 48 - 30 + 48 = 48 + 48 - 30 + 48 = 96 - 30 + 48 = 66 + 48 = 114
б) (238 + 49) – 29 – (49 – __ ) + __ – __ + __ – = 287 - 29 - (49 - 49) + 49 - 29 + 49 = 258 - 0 + 49 - 29 + 49 = 258 + 49 - 29 + 49 = 307 - 29 + 49 = 278 + 49 = 327
в) 182 – (52 + 46) = 182 - 98 = 84
г) 328 – (77 + 88) = 328 - 165 = 163
д) (177 – 88) – 17 = 89 - 17 = 72
е) 142 – (17 + 22) = 142 - 39 = 103
ж) (883 + 118) – 18 = 1001 - 18 = 983