Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 + 47 = _____
- 31 + 21 = _____
- 20 + 43 = _____
- 55 + 44 = _____
(a)
2 + 47 = 49
(b)
31 + 21 = 52
(c)
20 + 43 = 63
(d)
55 + 44 = 99
Answer(s): 49, 52, 63, 99