209. Проверь, верны ли неравенства. 478⋅24<478⋅(3⋅9) 356⋅10⋅6>356⋅16 296⋅80>296⋅(10+8) 134⋅19<134⋅9⋅10

• Неравенство 1: 478 ⋅ 24 < 478 ⋅ (3 ⋅ 9)
• 478 ⋅ 24 = 11472
• 478 ⋅ (3 ⋅ 9) = 478 ⋅ 27 = 12906
• 11472 < 12906 - верно
• Неравенство 2: 356 ⋅ 10 ⋅ 6 > 356 ⋅ 16
• 356 ⋅ 10 ⋅ 6 = 3560 ⋅ 6 = 21360
• 356 ⋅ 16 = 5696
• 21360 > 5696 - верно
• Неравенство 3: 296 ⋅ 80 > 296 ⋅ (10 + 8)
• 296 ⋅ 80 = 23680
• 296 ⋅ (10 + 8) = 296 ⋅ 18 = 5328
• 23680 > 5328 - верно
• Неравенство 4: 134 ⋅ 19 < 134 ⋅ 9 ⋅ 10
• 134 ⋅ 19 = 2546
• 134 ⋅ 9 ⋅ 10 = 1206 ⋅ 10 = 12060
• 2546 < 12060 - верно

Ответ: Все неравенства верны.