Упростите выражение: 0,4 ⋅ 0,1 ⋅ a ⋅ 0,8 ⋅ 25. Упростите выражение: 0,25 ⋅ 0,01 ⋅ z ⋅ 90 ⋅ 40.

Решение:

• Первое выражение:
  0,4 ⋅ 0,1 ⋅ a ⋅ 0,8 ⋅ 25 = (0,4 ⋅ 0,8) ⋅ (0,1 ⋅ 25) ⋅ a = 0,32 ⋅ 2,5 ⋅ a = 0,8 ⋅ a
• Второе выражение:
  0,25 ⋅ 0,01 ⋅ z ⋅ 90 ⋅ 40 = (0,25 ⋅ 40) ⋅ (0,01 ⋅ 90) ⋅ z = 10 ⋅ 0,9 ⋅ z = 9 ⋅ z

Ответ: 0,8 ⋅ a; 9 ⋅ z