Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 800 + 80 + _____ = 888
- 8000 + _____ + 40 = 8840
- _____ + 20 + 3 = 9023
- 70000 + _____ + 5 = 72005
(a)
800 + 80 + _____ = 888
880 + _____ = 888
888 - 880 = 8
(b)
8000 + _____ + 40 = 8840
8040+ _____ = 8840
8840 - 8040 = 800
(c)
_____ + 20 + 3 = 9023
_____ + 23 = 9023
9023 - 23 = 9000
(d)
70000 + _____ + 5 = 72005
70005 + _____ = 72005
72005 - 70005 = 2000
Answer(s): 8, 800, 9000, 2000