Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 700 - 80 + 800 = _______
- 822 = 500 + _______ + 50
- 6828 = 6000 + _______ + 8
- 9968 = 9060 + _______
(a)
700 - 80 + 800
= 700 + 800 - 80
= 1500 - 80
= 1420
(b)
822 = 500 + ______ + 50
822 = 500 + 50 + ______
822 = 550 + ______
822 - 550 = 272
(c)
6828 = 6000 + ______ + 8
6828 = 6000 + 8 + ______
6828 = 6008 + ______
6828 - 6008 = 820
(d)
9968 = 9060 + ______
9968 - 9060 = 908
Answer(s): 1420, 272, 820, 908