а)
8 ⋅ 129 + 8 ⋅ 171 = 8 ⋅ (129 + 171) = 8 ⋅ 300 = 2400
б)
4,8 ⋅ 3,7 - 4,8 ⋅ 2,7 = 4,8 ⋅ (3,7 - 2,7) = 4,8 ⋅ 1 = 4,8
в)
6,35 ⋅ 4,4 + 4,4 ⋅ 2,65 = 4,4 ⋅ (6,35 + 2,65) = 4,4 ⋅ 9 = 39,6
Ответ: а) 2400; б) 4,8; в) 39,6