Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 + 20 + _____ = 922
- 5000 + _____ + 70 = 5770
- _____ + 40 + 2 = 3042
- 30000 + _____ + 5 = 32805
(a)
900 + 20 + _____ = 922
920 + _____ = 922
922 - 920 = 2
(b)
5000 + _____ + 70 = 5770
5070+ _____ = 5770
5770 - 5070 = 700
(c)
_____ + 40 + 2 = 3042
_____ + 42 = 3042
3042 - 42 = 3000
(d)
30000 + _____ + 5 = 32805
30005 + _____ = 32805
32805 - 30005 = 2800
Answer(s): 2, 700, 3000, 2800