Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 90 + 400 = _______
- 652 = 500 + _______ + 50
- 3396 = 3000 + _______ + 6
- 6637 = 6030 + _______
(a)
900 - 90 + 400
= 900 + 400 - 90
= 1300 - 90
= 1210
(b)
652 = 500 + ______ + 50
652 = 500 + 50 + ______
652 = 550 + ______
652 - 550 = 102
(c)
3396 = 3000 + ______ + 6
3396 = 3000 + 6 + ______
3396 = 3006 + ______
3396 - 3006 = 390
(d)
6637 = 6030 + ______
6637 - 6030 = 607
Answer(s): 1210, 102, 390, 607