3. Write two addition formulas and two subtraction formulas with the following three numbers.

8、7、 15

Answer:

8+7= 15

7+ 15=22

8-7= 1

15-7=8

Methods and skills of learning mathematics well in senior one.

More practice means that students should carry out various forms of training to solve application problems. On the one hand, "applying what you have learned" can strengthen the consolidation of what you have learned, on the other hand, it can make students really feel the practicality of mathematics and the importance of learning mathematics, thus stimulating their interest in learning mathematics. Exercises can be divided into classroom exercises and extracurricular exercises. Read more extracurricular books and do more puzzles. We should feel the joy of "success" in the progress, produce a sense of accomplishment and pride in learning, and truly feel the ease and happiness of learning mathematics.