Question
Find the following values without a calculator.

  1. 1 - 911 = _____
  2. 22 - 12 = _____
  3. 411 - 311 = _____
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

(c)

Click button first when a symbol is required. X

Find the following values without a calculator.

  1. 1 - 911 = _____
  2. 22 - 12 = _____
  3. 411 - 311 = _____