2. Найти значение выражений.

Решение:

• \( 7 \cdot 4 + 6 \cdot 7 = 28 + 42 = 70 \)
• \( 9 \cdot 4 - 8 \cdot 4 = 36 - 32 = 4 \)
• \( 54 : 6 + 7 \cdot 4 = 9 + 28 = 37 \)
• \( 24 : 4 \cdot 7 - 32 = 6 \cdot 7 - 32 = 42 - 32 = 10 \)
• \( 48 + 72 : 9 = 48 + 8 = 56 \)
• \( 80 - 48 : 6 \cdot 5 = 80 - 8 \cdot 5 = 80 - 40 = 40 \)
• \( 36 + 64 : 8 = 36 + 8 = 44 \)
• \( 36 + 54 : 9 \cdot 3 = 36 + 6 \cdot 3 = 36 + 18 = 54 \)
• \( 60 - 7 \cdot 8 = 60 - 56 = 4 \)
• \( 39 + 32 : 4 = 39 + 8 = 47 \)
• \( 24 : 6 \cdot 8 - 16 = 4 \cdot 8 - 16 = 32 - 16 = 16 \)
• \( 71 - 6 \cdot 8 + 12 = 71 - 48 + 12 = 23 + 12 = 35 \)