1. Shopping calculation: When shopping, we need to calculate the price, discount and tax of the goods. Mathematical knowledge can help us make accurate calculations and ensure that we get the best price.

2. Cooking and recipes: In the cooking process, we need to measure the weight and capacity of ingredients and calculate the ratio and multiple according to the formula in the recipe. Mathematical knowledge can help us accurately measure and adjust ingredients to ensure the taste and taste of food.

3. Time and schedule management: We need to arrange time reasonably and manage the schedule well. Mathematical knowledge can help us calculate the time interval, the length of the time period, and arrange the order and priority of tasks reasonably.

4. Travel planning: In travel, we need to calculate the distance, speed, time and other factors to determine the best route and transportation mode. Mathematical knowledge can help us make accurate calculations and predictions to ensure smooth and efficient travel.

5. Finance and investment: In the field of finance and investment, mathematical knowledge is very important. We need to calculate interest rate, return on investment, risk assessment, etc. Mathematical knowledge can help us make wise decisions, maximize benefits and reduce risks.

6. Health management: Mathematical knowledge can help us calculate health indicators such as body mass index (BMI), heart rate and blood pressure. These indicators are very important for monitoring health status, making fitness plans and diet plans.

In a word, mathematical knowledge is widely used in daily life, whether in shopping, cooking, time management or financial investment, it is inseparable from the support and guidance of mathematics. By applying mathematical knowledge, we can better understand and solve problems in daily life and improve the quality and efficiency of life.