Question
Find the value of 1 unit.
  1. 1 u - 9 = 9
  2. 9 = 1 u - 8
  3. 7 - 2 = 1 u - 3
  4. 8 + 9 = 1 u - 1
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 value of 1 unit.
  1. 1 u - 9 = 9
  2. 9 = 1 u - 8
  3. 7 - 2 = 1 u - 3
  4. 8 + 9 = 1 u - 1