Question
Find the following values without a calculator.

  1. _____ + 8 = 47
  2. _____ + 15 = 55
  3. _____ + 69 = 79
  4. _____ + 87 = 98
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. _____ + 8 = 47
  2. _____ + 15 = 55
  3. _____ + 69 = 79
  4. _____ + 87 = 98