Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 600 - 30 + 200 = _______
- 637 = 500 + _______ + 90
- 4264 = 4000 + _______ + 4
- 2875 = 2070 + _______
(a)
600 - 30 + 200
= 600 + 200 - 30
= 800 - 30
= 770
(b)
637 = 500 + ______ + 90
637 = 500 + 90 + ______
637 = 590 + ______
637 - 590 = 47
(c)
4264 = 4000 + ______ + 4
4264 = 4000 + 4 + ______
4264 = 4004 + ______
4264 - 4004 = 260
(d)
2875 = 2070 + ______
2875 - 2070 = 805
Answer(s): 770, 47, 260, 805