Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 200 - 90 + 200 = _______
- 829 = 500 + _______ + 80
- 5777 = 5000 + _______ + 7
- 3835 = 3030 + _______
(a)
200 - 90 + 200
= 200 + 200 - 90
= 400 - 90
= 310
(b)
829 = 500 + ______ + 80
829 = 500 + 80 + ______
829 = 580 + ______
829 - 580 = 249
(c)
5777 = 5000 + ______ + 7
5777 = 5000 + 7 + ______
5777 = 5007 + ______
5777 - 5007 = 770
(d)
3835 = 3030 + ______
3835 - 3030 = 805
Answer(s): 310, 249, 770, 805