Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 400 + 60 + _____ = 461
- 1000 + _____ + 30 = 1130
- _____ + 40 + 2 = 4042
- 40000 + _____ + 2 = 46202
(a)
400 + 60 + _____ = 461
460 + _____ = 461
461 - 460 = 1
(b)
1000 + _____ + 30 = 1130
1030+ _____ = 1130
1130 - 1030 = 100
(c)
_____ + 40 + 2 = 4042
_____ + 42 = 4042
4042 - 42 = 4000
(d)
40000 + _____ + 2 = 46202
40002 + _____ = 46202
46202 - 40002 = 6200
Answer(s): 1, 100, 4000, 6200