Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 30 - 10 = _____
- 42 - 10 = _____
- 59 - 10 = _____
- 90 - 10 = _____
(a)
30 - 10 = 20
(b)
42 - 10 = 32
(c)
59 - 10 = 49
(d)
90 - 10 = 80
Answer(s): 20, 32, 49, 80