Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 600 - 20 + 500 = _______
- 825 = 500 + _______ + 20
- 2566 = 2000 + _______ + 6
- 5787 = 5080 + _______
(a)
600 - 20 + 500
= 600 + 500 - 20
= 1100 - 20
= 1080
(b)
825 = 500 + ______ + 20
825 = 500 + 20 + ______
825 = 520 + ______
825 - 520 = 305
(c)
2566 = 2000 + ______ + 6
2566 = 2000 + 6 + ______
2566 = 2006 + ______
2566 - 2006 = 560
(d)
5787 = 5080 + ______
5787 - 5080 = 707
Answer(s): 1080, 305, 560, 707