1. Выполнить умножение: 62×47, 39×45, 46×59, 37×16.

62×47 = 62×(40+7) = 2480+434 = 2914.

39×45 = 39×(40+5) = 1560+195 = 1755.

46×59 = 46×(60−1) = 2760−46 = 2714.

37×16 = 37×(10+6) = 370+222 = 592.