Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 30 + 300 = _______
- 777 = 500 + _______ + 30
- 8679 = 8000 + _______ + 9
- 3627 = 3020 + _______
(a)
900 - 30 + 300
= 900 + 300 - 30
= 1200 - 30
= 1170
(b)
777 = 500 + ______ + 30
777 = 500 + 30 + ______
777 = 530 + ______
777 - 530 = 247
(c)
8679 = 8000 + ______ + 9
8679 = 8000 + 9 + ______
8679 = 8009 + ______
8679 - 8009 = 670
(d)
3627 = 3020 + ______
3627 - 3020 = 607
Answer(s): 1170, 247, 670, 607