Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 600 - 50 + 800 = _______
- 682 = 500 + _______ + 70
- 8387 = 8000 + _______ + 7
- 3434 = 3030 + _______
(a)
600 - 50 + 800
= 600 + 800 - 50
= 1400 - 50
= 1350
(b)
682 = 500 + ______ + 70
682 = 500 + 70 + ______
682 = 570 + ______
682 - 570 = 112
(c)
8387 = 8000 + ______ + 7
8387 = 8000 + 7 + ______
8387 = 8007 + ______
8387 - 8007 = 380
(d)
3434 = 3030 + ______
3434 - 3030 = 404
Answer(s): 1350, 112, 380, 404