Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 600 - 90 + 900 = _______
- 782 = 500 + _______ + 70
- 8543 = 8000 + _______ + 3
- 7759 = 7050 + _______
(a)
600 - 90 + 900
= 600 + 900 - 90
= 1500 - 90
= 1410
(b)
782 = 500 + ______ + 70
782 = 500 + 70 + ______
782 = 570 + ______
782 - 570 = 212
(c)
8543 = 8000 + ______ + 3
8543 = 8000 + 3 + ______
8543 = 8003 + ______
8543 - 8003 = 540
(d)
7759 = 7050 + ______
7759 - 7050 = 709
Answer(s): 1410, 212, 540, 709