Question
Find the following values without a calculator.
  1. 13 + 31 = _____
  2. 93 + 73 = _____
  3. 47 + 26 = _____
  4. 20 + 97 = _____
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. 13 + 31 = _____
  2. 93 + 73 = _____
  3. 47 + 26 = _____
  4. 20 + 97 = _____