Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 70 + 400 = _______
- 699 = 500 + _______ + 70
- 8763 = 8000 + _______ + 3
- 3864 = 3060 + _______
(a)
900 - 70 + 400
= 900 + 400 - 70
= 1300 - 70
= 1230
(b)
699 = 500 + ______ + 70
699 = 500 + 70 + ______
699 = 570 + ______
699 - 570 = 129
(c)
8763 = 8000 + ______ + 3
8763 = 8000 + 3 + ______
8763 = 8003 + ______
8763 - 8003 = 760
(d)
3864 = 3060 + ______
3864 - 3060 = 804
Answer(s): 1230, 129, 760, 804