Students have been exposed to decimals since the second volume of grade one, and have a preliminary understanding of decimals in grade three: they can read and write decimals, calculate simple decimal sizes, and calculate simple decimal addition and subtraction. This part focuses on understanding the meaning of decimals and the calculation method of decimal addition and subtraction, and the difficulty lies in further communicating the relationship between decimals and fractions.
The Teaching Objective of "Preliminary Understanding of Decimals"
1, combined with the actual life, through measuring, measuring and finding to know decimals, reading and writing decimals, and knowing the names of various parts of decimals.
2. Experience the process of decimal system, deepen the understanding of the meaning of decimal system, and develop students' mathematical thinking ability and the ability to express and exchange information in decimal system.
3, can correctly distinguish between integers and decimals, penetrate the connection between knowledge, and stimulate students' interest in learning mathematics.