Your bank account has $50 in it. You make a deposit for $25 and $15. You withdraw $60. How much is left?
What is $30?
|-15|
15
-4 + 8 + 7 + -3
What is 8?
|-12| + -|12|
0
-20 + -35 + -10 + 65
What is 0?
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