4. Сравни выражения. 200 - 60 \(\cdot\) 2 \(\bigcirc\) (200 - 60) \(\cdot\) 2 350 : 5 \(\cdot\) 2 \(\bigcirc\) 350 : \(5 \cdot 2\) 42 : \(3 \cdot 2\) \(\bigcirc\) 42 : 3 \(\cdot\) 2

Решение:

1. \( 200 - 60 \cdot 2 = 200 - 120 = 80 \)
2. \( (200 - 60) \cdot 2 = 140 \cdot 2 = 280 \)

\( 80 < 280 \)

3. \( 350 : 5 \cdot 2 = 70 \cdot 2 = 140 \)
4. \( 350 : (5 \cdot 2) = 350 : 10 = 35 \)

\( 140 > 35 \)

5. \( 42 : (3 \cdot 2) = 42 : 6 = 7 \)
6. \( 42 : 3 \cdot 2 = 14 \cdot 2 = 28 \)

\( 7 < 28 \)

Ответ: 200 - 60 \(\cdot\) 2 < (200 - 60) \(\cdot\) 2; 350 : 5 \(\cdot\) 2 > 350 : (5 \(\cdot\) 2); 42 : (3 \(\cdot\) 2) < 42 : 3 \(\cdot\) 2.