Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 600 + 30 + _____ = 633
- 7000 + _____ + 80 = 7280
- _____ + 60 + 7 = 7067
- 90000 + _____ + 9 = 97409
(a)
600 + 30 + _____ = 633
630 + _____ = 633
633 - 630 = 3
(b)
7000 + _____ + 80 = 7280
7080+ _____ = 7280
7280 - 7080 = 200
(c)
_____ + 60 + 7 = 7067
_____ + 67 = 7067
7067 - 67 = 7000
(d)
90000 + _____ + 9 = 97409
90009 + _____ = 97409
97409 - 90009 = 7400
Answer(s): 3, 200, 7000, 7400