Question
Find the following values without a calculator.

  1. 11 + _____ = 33
  2. 25 + _____ = 48
  3. 54 + _____ = 72
  4. 73 + _____ = 187
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. 11 + _____ = 33
  2. 25 + _____ = 48
  3. 54 + _____ = 72
  4. 73 + _____ = 187