Question 1
1a. Solve Mentally:
__________ = 573 - 10
1b. Solve mentally:
__________ + 10 = 174
1c. Solve mentally
283 + 100 = __________
1d. Solve mentally
39 + __________ = 82
1e. Solve mentally
__________ = 166 - 40
1f. Solve mentally
__________ - 100 = 81