3. Выполнить умножение: 76×53, 92×19, 29×32, 45×43.

76×53 = 76×(50+3) = 3800+228 = 4028.

92×19 = 92×(20−1) = 1840−92 = 1748.

29×32 = 29×(30+2) = 870+58 = 928.

45×43 = 45×(40+3) = 1800+135 = 1935.