Завдання:
Виконай дії зручним способом:
1) –0,2 ⋅ 39 ⋅ (–5);
2) 4 ⋅ 29 – 14 ⋅ 29.
Розв'язок:
1) -0,2 ⋅ 39 ⋅ (-5) = -0,2 ⋅ (-5) ⋅ 39 = 1 ⋅ 39 = 39
2) 4 ⋅ 29 – 14 ⋅ 29 = 29 ⋅ (4 – 14) = 29 ⋅ (-10) = -290
Виконай дії зручним способом:
1) –0,2 ⋅ 39 ⋅ (–5);
2) 4 ⋅ 29 – 14 ⋅ 29.
1) -0,2 ⋅ 39 ⋅ (-5) = -0,2 ⋅ (-5) ⋅ 39 = 1 ⋅ 39 = 39
2) 4 ⋅ 29 – 14 ⋅ 29 = 29 ⋅ (4 – 14) = 29 ⋅ (-10) = -290