Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 300 - 40 + 300 = _______
- 636 = 500 + _______ + 50
- 9982 = 9000 + _______ + 2
- 4743 = 4040 + _______
(a)
300 - 40 + 300
= 300 + 300 - 40
= 600 - 40
= 560
(b)
636 = 500 + ______ + 50
636 = 500 + 50 + ______
636 = 550 + ______
636 - 550 = 86
(c)
9982 = 9000 + ______ + 2
9982 = 9000 + 2 + ______
9982 = 9002 + ______
9982 - 9002 = 980
(d)
4743 = 4040 + ______
4743 - 4040 = 703
Answer(s): 560, 86, 980, 703