Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 400 + 10 + _____ = 412
- 4000 + _____ + 30 = 4730
- _____ + 30 + 3 = 7033
- 80000 + _____ + 2 = 81402
(a)
400 + 10 + _____ = 412
410 + _____ = 412
412 - 410 = 2
(b)
4000 + _____ + 30 = 4730
4030+ _____ = 4730
4730 - 4030 = 700
(c)
_____ + 30 + 3 = 7033
_____ + 33 = 7033
7033 - 33 = 7000
(d)
80000 + _____ + 2 = 81402
80002 + _____ = 81402
81402 - 80002 = 1400
Answer(s): 2, 700, 7000, 1400