Mixed addition and subtraction (Multiple digits)：練習問題

A craftsman has a wire \( 1,200 \) cm long. He uses \( 300 \) cm for a small frame and \( 400 \) cm for a large frame. Then, he joins a new piece of wire \( 500 \) cm long to the remaining wire. What is the total length of wire he has now?

Alice wants to buy a professional camera that costs \(8,000\) dollars. She saved \(2,450\) dollars in the first month and \(3,120\) dollars in the second month. How many more dollars does she still need to save to be able to afford the camera?

A construction project has a total starting budget of \(750,000\) dollars.
- They spent \(215,400\) dollars on building materials.
- They spent \(189,750\) dollars on labor costs.
- They received a tax rebate of \(12,300\) dollars back into the budget.
- They then spent \(45,600\) dollars on equipment rental.

How much money is remaining in the project budget?

A store has 845 bottles of apple juice. On Saturday, they received 120 more bottles. On Sunday, they sold 315 bottles. How many bottles of apple juice are left in the store?

A science museum had \(1,450\) visitors in the morning. In the afternoon, \(2,380\) more visitors arrived. Before the museum closed in the evening, \(1,120\) visitors left the building. How many visitors were still in the museum?

A fruit seller had \( 430 \) oranges. He bought \( 150 \) more oranges, then sold \( 200 \) oranges. How many oranges does he have left?

A train carried \( 875 \) passengers. At the next station, \( 210 \) passengers got off and \( 180 \) passengers got on. How many passengers are on the train now?

A bakery baked $$475$$ cupcakes in the morning. They sold $$198$$ cupcakes by lunchtime and then baked an additional $$250$$ cupcakes in the afternoon. How many cupcakes does the bakery have now?

A workshop had \( 560 \) nails in a large box. A carpenter used \( 120 \) nails to build a table and \( 230 \) nails to build a shelf.

a) How many nails did the carpenter use in total for the table and the shelf?

b) How many nails are left in the box now?

A pet store had $$365$$ fish and $$210$$ hamsters. Last week, they buy121 fish . This week, they got a new delivery of $$70$$ fish.

How many fish does the pet store have now?