How much money do I have left if I buy a soda? By the end of the week, how much of my daily allowance will I be able to save if I don't?
There are other sources for worksheets also. You can find many public schools and private schools which will provide free worksheets for you if you buy textbooks from the school.
It is amazing the difference in effort you will get from worksheet to worksheet. Granted the amount of effort may vary immensely from year to year depending on the group of students you have.
Subtract 1-, 2-, or 3-digit numbers from 3- and 4-digit number with/without renaming
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