Question
Find the following values without a calculator.

  1. 88 - 3 = _____
  2. 79 - 4 = _____
  3. 61 - 20 = _____
  4. 53 - 19 = _____
4 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

(d)

Click button first when a symbol is required. X

Find the following values without a calculator.

  1. 88 - 3 = _____
  2. 79 - 4 = _____
  3. 61 - 20 = _____
  4. 53 - 19 = _____