Question
Find the following values without a calculator.
  1. 72 + 80 = _____
  2. 81 + 44 = _____
  3. 65 + 66 = _____
  4. 77 + 74 = _____
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

(d)

Click button first when a symbol is required. X

Find the following values without a calculator.
  1. 72 + 80 = _____
  2. 81 + 44 = _____
  3. 65 + 66 = _____
  4. 77 + 74 = _____