4 yuan and 6 yuan bought 1, 1 kg carrots and1500g tomatoes respectively.

2. The mathematical question is: How much is eggplant more expensive than carrots per 500g carrot eggplant?

This topic examines the application of unit conversion and four operations, and the specific problem-solving ideas are as follows:

1, the first problem is that we need to convert the two units, namely 1Kg= 1000g, and the unit price of carrots and tomatoes is 2 yuan per 500 g, so we only need to find out how many 50s are in 1000g and 1500g.

2. The carrot is (1000÷500)×2=4 (yuan), and the tomato is (1500÷500)×2=6 (yuan).

3. Second question Because the unit prices of carrots and eggplants given in the table are 2 yuan and 3 yuan respectively, if you want to calculate how much more expensive eggplants are than carrots, you can directly subtract the unit price of carrots from the unit price of eggplants.

Namely: 3-2= 1 (yuan), eggplant is more expensive than carrot 1 yuan.

Extended data

The method of elementary arithmetic:

1, same level, from left to right.

2. Two-stage operation, first multiply and then divide, then add and subtract.

3. When there are brackets, count the inside of brackets first, and then count the outside of brackets.

4. When there are multiple brackets, count the brackets first, then the brackets inside, then the braces inside, and finally the brackets outside.

5. If there is a power, calculate the power first.

6. In the mixed operation, the numbers in parentheses are calculated first, and the parentheses are from small to large. If there is a power, calculate the power first, and then from high to low.

Baidu encyclopedia-elementary arithmetic