Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 30 + 200 = _______
- 733 = 500 + _______ + 70
- 5724 = 5000 + _______ + 4
- 4845 = 4040 + _______
(a)
900 - 30 + 200
= 900 + 200 - 30
= 1100 - 30
= 1070
(b)
733 = 500 + ______ + 70
733 = 500 + 70 + ______
733 = 570 + ______
733 - 570 = 163
(c)
5724 = 5000 + ______ + 4
5724 = 5000 + 4 + ______
5724 = 5004 + ______
5724 - 5004 = 720
(d)
4845 = 4040 + ______
4845 - 4040 = 805
Answer(s): 1070, 163, 720, 805