Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 40 + 500 = _______
- 616 = 500 + _______ + 50
- 4679 = 4000 + _______ + 9
- 7726 = 7020 + _______
(a)
900 - 40 + 500
= 900 + 500 - 40
= 1400 - 40
= 1360
(b)
616 = 500 + ______ + 50
616 = 500 + 50 + ______
616 = 550 + ______
616 - 550 = 66
(c)
4679 = 4000 + ______ + 9
4679 = 4000 + 9 + ______
4679 = 4009 + ______
4679 - 4009 = 670
(d)
7726 = 7020 + ______
7726 - 7020 = 706
Answer(s): 1360, 66, 670, 706