Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 500 - 30 + 700 = _______
- 625 = 500 + _______ + 30
- 6377 = 6000 + _______ + 7
- 5398 = 5090 + _______
(a)
500 - 30 + 700
= 500 + 700 - 30
= 1200 - 30
= 1170
(b)
625 = 500 + ______ + 30
625 = 500 + 30 + ______
625 = 530 + ______
625 - 530 = 95
(c)
6377 = 6000 + ______ + 7
6377 = 6000 + 7 + ______
6377 = 6007 + ______
6377 - 6007 = 370
(d)
5398 = 5090 + ______
5398 - 5090 = 308
Answer(s): 1170, 95, 370, 308