Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 20 - 10 = _____
- 49 - 10 = _____
- 65 - 10 = _____
- 85 - 10 = _____
(a)
20 - 10 = 10
(b)
49 - 10 = 39
(c)
65 - 10 = 55
(d)
85 - 10 = 75
Answer(s): 10, 39, 55, 75