Students need to know the cardinality and ordinal meaning of these numbers, and be able to read and compare them correctly. Secondly, students need to master the addition and subtraction operations of 6 ~ 10, including decomposition and combination, borrowing one and returning ten, and can correctly calculate the results.
When learning this part, teachers can help students understand the meaning and calculation method of addition and subtraction through intuitive teaching AIDS and physical operations. For example, teachers can let students use sticks, counters and other tools to simulate the process of addition and subtraction, or stimulate students' interest and enthusiasm in learning through games and competitions.
At the same time, teachers need to pay attention to students' cognitive ability and thinking habits, and gradually guide students to form abstract thinking and logical reasoning ability. For example, teachers can let students discover the laws and skills of addition and subtraction through observation, comparison and analysis, and then they can calculate the results more quickly and accurately.
Skills of addition and subtraction:
1, ten method: ten method is a common addition and subtraction technique, which simplifies the calculation process by synthesizing the array into multiples of ten. For example, when calculating 9+5, it can be converted into 10+4, so that the result can be obtained quickly. Adding ten can not only improve the calculation speed, but also help students better understand the essence of addition.
2. Borrowing one and returning ten: Borrowing one and returning ten is a common skill of subtraction. It borrows a digit in the calculation process to simplify the calculation. For example, when calculating 13-8, it can be converted into 10-8+3, so that the result can be obtained quickly. Borrowing one and returning ten can not only help students master subtraction operation faster, but also cultivate their mathematical thinking and logical reasoning ability.
3. Split method: Split method is another commonly used technology. It breaks the number into smaller parts and then adds them up to get the final result. For example, when calculating 9+7, it can be divided into 9+ 1+6, so that the result can be obtained quickly. Split method can not only help students master addition operation faster, but also cultivate their mathematical thinking and innovation ability.