1. Make the students calculate the number of whole tens divided by tens, hundreds and tens (quotient one digit). <br>2. To enable students to master the calculation method of dividing two or three digits by two digits. <br>3. Enable students to experience the process of exploration and understand the changing laws of quotient. <br>4. Enable students to perform division estimation in combination with specific situations, and explain the idea of estimation. <br>5. To enable students to use the knowledge they have learned to solve simple practical problems and feel the role of mathematics in life.
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