Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6 + 41 = _____
- 31 + 20 = _____
- 21 + 42 = _____
- 55 + 44 = _____
(a)
6 + 41 = 47
(b)
31 + 20 = 51
(c)
21 + 42 = 63
(d)
55 + 44 = 99
Answer(s): 47, 51, 63, 99