Завдання:
Обчисли значення виразу, використовуючи розподільну властивість множення:
1) 387 ⋅ 73 + 387 ⋅ 27;
2) 842 ⋅ 39 + 158 ⋅ 39;
3) 18 ⋅ 918 – 18 ⋅ 818;
4) 7292 ⋅ 27 – 7292 ⋅ 26.
Розв'язок:
1) 387 ⋅ 73 + 387 ⋅ 27 = 387 ⋅ (73 + 27) = 387 ⋅ 100 = 38 700
2) 842 ⋅ 39 + 158 ⋅ 39 = 39 ⋅ (842 + 158) = 39 ⋅ 1000 = 39 000
3) 18 ⋅ 918 – 18 ⋅ 818 = 18 ⋅ (918 – 818) = 18 ⋅ 100 = 1800
4) 7292 ⋅ 27 – 7292 ⋅ 26 = 7292 ⋅ (27 – 26) = 7292 ⋅ 1 = 7292