Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 100 + 30 + _____ = 138
- 5000 + _____ + 10 = 5210
- _____ + 40 + 1 = 7041
- 20000 + _____ + 6 = 26906
(a)
100 + 30 + _____ = 138
130 + _____ = 138
138 - 130 = 8
(b)
5000 + _____ + 10 = 5210
5010+ _____ = 5210
5210 - 5010 = 200
(c)
_____ + 40 + 1 = 7041
_____ + 41 = 7041
7041 - 41 = 7000
(d)
20000 + _____ + 6 = 26906
20006 + _____ = 26906
26906 - 20006 = 6900
Answer(s): 8, 200, 7000, 6900