1. Dongfeng Hardware Factory used 93kg of coal in January, and saved 2 1 kg in February and 32kg in March. How many kilograms of coal were used in March?

2. The school bought 50 boxes of white chalk, less 12 boxes of colored chalk, and used 15 boxes of colored chalk. How many boxes of colored chalk are left?

3. White rabbits 15, gray rabbits 12, and black rabbits are 7 less than white rabbits. How many rabbits are different from black rabbits?

There are 34 pears, 18 apples and 3 1 orange on the table. How much fruit is there on the table?

There are 15 birds in the forest, 26 birds fly in at dusk and 38 birds fly away at night. How many birds are there in the forest?

6. Lixin food market sold 49 kg of cabbage on the first morning, 37 kg in the afternoon, and 25 kg less than the first day the next day. How many Jin did you sell the next day?

7. Coat 96 yuan, sweatpants 76 yuan, badminton racket 78 yuan. How much does it cost to buy a suit?

8.80 kg radish, eggplant is more than radish 12 kg. I sold 40 Jin of eggplant, how many Jin of eggplant is left?

9. There are 32 peach trees, 30 pear trees and 75 citrus trees. How many pears are fewer than oranges?

10. A bus with 36 passengers got off at Shengli Street Station, 18 passengers got on with 29 passengers. How many passengers are there in the car at this time?