Question
Find the following values without a calculator.

  1. _____ + 15 = 37
  2. _____ + 27 = 35
  3. _____ + 40 = 59
  4. _____ + 95 = 128
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. _____ + 15 = 37
  2. _____ + 27 = 35
  3. _____ + 40 = 59
  4. _____ + 95 = 128