Find their values orally.

Instructions:

Calculate the value of each expression mentally.

Expressions:

• 86 ⋅ 11 − 86
  We can factor out 86: $$86 \cdot (11 - 1) = 86 \cdot 10 = 860$$.
• 9 + 78
  9 + 78 = 87.
• 31 ⋅ 7
  31 multiplied by 7 is 217.
• 95 ⋅ 2
  95 multiplied by 2 is 190.