84-72= 12, so the first car carries 12 more apples than the second car. To make two cars transport the same number of apples, the first car should give six apples to the second car, while 28-22=6 and 30-24=6. Therefore, exchanging 28 and 22 apples for two baskets, or exchanging 30 and 24 apples for two baskets, can make two cars transport the same number of apples.
Careful observation of the number of baskets of the two cars shows that there are 26 baskets on the left and right cars, so we can only consider changing two baskets in the other four pipes. Take the left-hand car as the standard, you can interchange "30" and "24" or "30" and "22". Through calculation, it can be seen that "30" and "24" are interchangeable, and the number of apples transported by the two cars is the same.
To change the number of two groups of objects from different to the same, the strategy of "trying to adjust" can be adopted. We can first observe and compare whether the two groups have the same part. If there are the same parts, it is easier to ignore the same parts and only consider the different parts.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.