| Category | Format | Size |
|---|---|---|
| People's Education Press Mathematics Volume 2 for Sixth Grade | pptx | 6 MB |
"Proportional Quantities" Proportional PPT Courseware
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"Proportional Quantities" Proportional PPT Courseware
How to find the speed when the distance and time are known?
Speed = distance ÷ time
How to find the unit price if the total price and quantity are known?
Unit price = total price ÷ quantity
How to calculate work efficiency when the total amount of work and working hours are known?
Work efficiency = total amount of work ÷ working time
Compare Example 1 and Example 2. What do these two examples have in common?
When one quantity changes, the other quantity also changes. If the ratio (that is, the quotient) of the two corresponding numbers in the two quantities is constant, the two quantities are called directly proportional quantities, and their relationship is called Direct proportional relationship.
The total weight of flour and the number of bags are two related quantities. They have the following relationship with the weight of each bag of flour:
It is known that the weight of each bag of flour is constant, that is, the ratio of the total weight of flour to the number of bags is constant, so the total weight of flour is directly proportional to the number of bags.
Determine whether the two quantities in each question below are directly proportional and explain why.
(1) The unit price of apples is certain, the quantity and total price of apples purchased.
(2) The ship travels at a certain speed, the distance and time it travels.
(3) The number of weaving meters per hour is certain, the total number of weaving meters and time.
(4) Xiaoxin’s high jump height and his height.
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For more information about the PPT courseware "Proportion of Quantities in Proportion", please click the Proportion of Quantity in Proportion ppt tag.
"Proportional Quantities" Direct Proportional and Inverse Proportional PPT Courseware 2:
"Quantities in Direct Proportion" Direct Proportional and Inverse Proportional PPT Courseware 2 Teaching Objectives 1. Help students understand the meaning of direct proportion through observation, comparison, judgment, induction and other methods. 2. Cultivate students to analyze problems from the perspective of interconnectedness and development of things, and be able to...
"Proportional Quantities" Direct Proportional and Inverse Proportional PPT Courseware:
"Proportional Quantities" Direct Proportional and Inverse Proportional PPT Courseware The volume changes as the height changes. We call two quantities like this related quantities. As the height increases, the volume expands. The height decreases and the volume shrinks..
"Understanding Proportional Quantities" Direct Proportional and Inverse Proportional PPT Courseware 2:
"Understanding Proportional Quantities" Direct Proportional and Inverse Proportional PPT Courseware 2 State the relationship between each set of quantities below (1) Speed time = distance (2) Unit price quantity = total price (3) Work efficiency Working time = Total amount of work. .. ... ... (1) Fill in the table above and tell us...
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Update Time: 2024-07-06
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