Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- _____ - 11 = 77
- _____ - 42 = 31
- _____ - 26 = 13
- _____ - 53 = 44
(a)
11 + 77 = 88
(b)
42 + 31 = 73
(c)
26 + 13 = 39
(d)
53 + 44 = 97
Answer(s): 88, 73, 39, 97