Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 10 + 8 = _____
- 20 + 9 = _____
- 10 + 11 = _____
- 30 + 25 = _____
(a)
10 + 8 = 18
(b)
20 + 9 = 29
(c)
10 + 11 = 21
(d)
30 + 25 = 55
Answer(s): 18, 29, 21, 55