Addition, subtraction, multiplication and division in life include shopping calculations, diet calculations, financial calculations, geometric calculations, and time calculations.

1. Shopping calculation

When shopping, we need to calculate the total price of the product, which is an addition operation. For example, add the prices of multiple items to get the total purchase price. When shopping, we may need to calculate the actual amount paid after discounts, which is a subtraction operation. For example, subtract the discount amount from the original price of the item to get the actual amount paid.

2. Diet calculation

When cooking, we need to calculate the amount of various ingredients according to the recipe. This is an addition operation. For example, add the weights of individual ingredients to get the total amount. During the cooking process, we may need to calculate the weight of the remaining ingredients, which is a subtraction operation. For example, subtract the used weight from the initial ingredient weight to get the remaining amount.

3. Financial calculation

In financial management and investment, we need to calculate the total income of different investment projects, which is an addition operation. For example, the returns from each investment project are added together to obtain the total return. In financial management and investment, we need to calculate the remaining amount after investing the principal minus expenses. This is a subtraction operation. For example, subtract the amount of expenses from the principal invested to get the remaining amount.

4. Geometric calculation

When measuring the length of an object, we may need to add the lengths of multiple parts to get the total length. For example, add the lengths of multiple lengths of rope to get the total length. When measuring the length of an object, we may need to calculate the remaining length, which is a subtraction operation. For example, subtract the already measured portion from the overall length to get the remaining length.

5. Time calculation

In daily life, we need to calculate the accumulation of time, for example, add multiple time periods to get the total duration. For example, add the durations of multiple working time periods together to get the total working hours. When scheduling, we need to calculate the difference in time, for example, calculate the time interval between two points in time. For example, calculate the time difference between two events.