Используя распределительный закон, запишите разность в виде произведения:
а) 7 ⋅ 13 − 7 ⋅ 2
б) 5 ⋅ 23 − 5 ⋅ 8
в) 18 ⋅ 9 − 18 ⋅ 7
г) 25 ⋅ 13 − 25 ⋅ 10
Ответ
а) 7 ⋅ 13 − 7 ⋅ 2 = 7 ⋅ (13 − 2)
б) 5 ⋅ 23 − 5 ⋅ 8 = 5 ⋅ (23 − 8)
в) 18 ⋅ 9 − 18 ⋅ 7 = 18 ⋅ (9 − 7)
г) 25 ⋅ 13 − 25 ⋅ 10 = 25 ⋅ (13 − 10)