Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 400 - 30 + 600 = _______
- 739 = 500 + _______ + 70
- 5675 = 5000 + _______ + 5
- 6555 = 6050 + _______
(a)
400 - 30 + 600
= 400 + 600 - 30
= 1000 - 30
= 970
(b)
739 = 500 + ______ + 70
739 = 500 + 70 + ______
739 = 570 + ______
739 - 570 = 169
(c)
5675 = 5000 + ______ + 5
5675 = 5000 + 5 + ______
5675 = 5005 + ______
5675 - 5005 = 670
(d)
6555 = 6050 + ______
6555 - 6050 = 505
Answer(s): 970, 169, 670, 505