Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 720 + 7 = ______
- 21 + 31 = _____
- 132 + 324 = _____
- 3170 + 512 = _____
(a)
720 + 7 = 727
(b)
21 + 31 = 52
(c)
132 + 324 = 456
(d)
3170 + 512 = 3682
Answer(s): 727, 52, 456, 3682