Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6 + 18 = _____
- 9 + 21 = _____
- 38 + 57 = _____
- 31 + 11 = _____
(a)
6 + 18 = 24
(b)
9 + 21 = 30
(c)
38 + 57 = 95
(d)
31 + 11 = 42
Answer(s): 24, 30, 95, 42