Three Seventh Grade Word Problems

1.Sally does a math problem in math class that is
-3+7=?What would your answer be??

2.Sally IIV has 683 dollars in a purse she buys a 300
dollar coat with a tax of 2.7 percent with a discount of 2
percent how much does she have left and how much does
she pay?

3.Sally has 1,000 dollars in the bank she withdraws 700
dollars to pay off a 600 dollar loan how much money does
Sally have left?