Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 600 - 80 + 600 = _______
- 753 = 500 + _______ + 90
- 5285 = 5000 + _______ + 5
- 3378 = 3070 + _______
(a)
600 - 80 + 600
= 600 + 600 - 80
= 1200 - 80
= 1120
(b)
753 = 500 + ______ + 90
753 = 500 + 90 + ______
753 = 590 + ______
753 - 590 = 163
(c)
5285 = 5000 + ______ + 5
5285 = 5000 + 5 + ______
5285 = 5005 + ______
5285 - 5005 = 280
(d)
3378 = 3070 + ______
3378 - 3070 = 308
Answer(s): 1120, 163, 280, 308