1, Xiaoming and Xiaohong have the same number of stamps. If Xiaoming gave Xiaohong four stamps, how many more would Xiaohong have than Xiaoming?

2. Chen Xiao has 16 pens and Xiao Li has 12 pens. How many pens should Xiao Chen give Xiao Li to make them have the same number?

3. Pony has more books than Xiao Wu 10. How many books does Pony have to give Xiao Wu so that they can have the same number of books?

4. Two people from Class A are transferred to Class B, with the same number of students in both classes. How many people are there in Class A than in Class B?

Xiaohua ate half a bag of biscuits. If he eats six more cookies, how many are left?

6. Two piles of coal, A pile 130 tons and B pile 80 tons, are transported from A pile to B pile by a car with a load of 5 tons. How many times will the amount of coal in the two piles be the same?

7. After giving money to my sister 2 yuan, my sister has more money from 2 yuan than her sister. It turns out that my sister is richer than her sister.

My brother had five more books than my brother. After my brother gave my brother two books, how many more books did my brother have than my brother?

9. After Xiaoping gave Xiaohong four books, Xiaoping lost three books. How many books does Xiaoping have?

10. On the supermarket shelves, there are more drinks on the first floor than on the second floor 15 bottles. After taking a few bottles from the first floor and putting them on the second floor, there are three more bottles of drinks on the second floor than on the first floor.