How to learn the progress rate between unit of volume?
The teaching requirements about the progress speed between unit of volume and unit of volume in the fifth grade mathematics published by Jiangsu Education Edition enable students to master the progress speed and the rewriting of common names and numbers on the basis of understanding. The rate of progress between unit volumes, the focus of teaching. Teaching equipment projector and cube model with side length of 1 decimeter, as shown in the picture on page 37 of the textbook. Teaching process 1. Create a situation to fill in the blanks: ① cuboid volume =; (2) Commonly used unit of volume are,,; ③ Cubic volume =. Teacher: Do you know the progress rate between every two neighboring unit of volume? Today, we will learn about the speed of progress between unit of volume. (Writing on the blackboard) 2. Exploratory research 1. Group learning-progress between unit volumes. (1) display: 1 cube model teaching aid, side length 1 decimeter. Question: ① When the side length of a cube is 1 decimeter, what is its volume? ② When the side length of a cube is 10 cm, what is its volume? ③ How many centimeters is 1 decimeter? 1 cubic decimeter equals to how many cubic centimeters? Team work to fill in the form: cube side length 1 decimeter = 1 0cm volume1cubic decimeter = 1000 cubic centimeter. Conclusion of the team report: 1 decimeter cubic = 1000 cubic centimeter. Similarly, 1 m3 = 65438+. (2) Compare length units, area units and unit of volume (the table on page 38 is projection). Ask the students to fill in the blanks first, and then compare the forward speed between two adjacent units of these three types of units. Why? (3) Rewriting the name of the learning unit. Think about it first: (1) How to rewrite the name of the superior unit of volume into the name of the subordinate unit of volume? (2) How to rewrite the name of unit of volume at a lower level into the name of unit of volume at a higher level? Example 3, and write it in the following form: 8 cubic meters = () cubic decimeter 0.54 cubic meters = () cubic decimeter Example 4, and write it in the following form: 3400 cubic centimeters = () cubic decimeter 96 cubic centimeters = () cubic decimeter Students think independently, and then discuss in groups how they think and do it. For example, 5. (Projection display) Let students examine and answer questions independently, and then focus on the problems that arise. Solution 1: 2.2× 1.5× 0.0 1 = 0.033 (cubic meter) 0.033 cubic meter =33 cubic decimeters Solution 2: 2.2 meters =22 decimeters1.5 meters = 15 decimeters 0.0/ Fourth, class summary. Students summarize what they have learned today. 5. Exercise 3, 4 and 5 of Exercise 8 after class.