Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 400 - 70 + 600 = _______
- 859 = 500 + _______ + 80
- 4328 = 4000 + _______ + 8
- 5468 = 5060 + _______
(a)
400 - 70 + 600
= 400 + 600 - 70
= 1000 - 70
= 930
(b)
859 = 500 + ______ + 80
859 = 500 + 80 + ______
859 = 580 + ______
859 - 580 = 279
(c)
4328 = 4000 + ______ + 8
4328 = 4000 + 8 + ______
4328 = 4008 + ______
4328 - 4008 = 320
(d)
5468 = 5060 + ______
5468 - 5060 = 408
Answer(s): 930, 279, 320, 408