Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 100 + 80 + _____ = 188
- 6000 + _____ + 50 = 6150
- _____ + 20 + 5 = 1025
- 70000 + _____ + 9 = 75009
(a)
100 + 80 + _____ = 188
180 + _____ = 188
188 - 180 = 8
(b)
6000 + _____ + 50 = 6150
6050+ _____ = 6150
6150 - 6050 = 100
(c)
_____ + 20 + 5 = 1025
_____ + 25 = 1025
1025 - 25 = 1000
(d)
70000 + _____ + 9 = 75009
70009 + _____ = 75009
75009 - 70009 = 5000
Answer(s): 8, 100, 1000, 5000