3. Реши примеры. 90-(30+16)= (63+7)-59= 53+(68-60) = 72-8+9 = 80-(40+16) = (72+8)-49 =

Решение:

• \( 90 - (30 + 16) = 90 - 46 = 44 \)
• \( (63 + 7) - 59 = 70 - 59 = 11 \)
• \( 53 + (68 - 60) = 53 + 8 = 61 \)
• \( 72 - 8 + 9 = 64 + 9 = 73 \)
• \( 80 - (40 + 16) = 80 - 56 = 24 \)
• \( (72 + 8) - 49 = 80 - 49 = 31 \)

Ответ: 44, 11, 61, 73, 24, 31.