Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 70 + 600 = _______
- 602 = 500 + _______ + 60
- 8799 = 8000 + _______ + 9
- 2747 = 2040 + _______
(a)
900 - 70 + 600
= 900 + 600 - 70
= 1500 - 70
= 1430
(b)
602 = 500 + ______ + 60
602 = 500 + 60 + ______
602 = 560 + ______
602 - 560 = 42
(c)
8799 = 8000 + ______ + 9
8799 = 8000 + 9 + ______
8799 = 8009 + ______
8799 - 8009 = 790
(d)
2747 = 2040 + ______
2747 - 2040 = 707
Answer(s): 1430, 42, 790, 707