"Into the Zoo" PPT courseware 4

Description

"Into the Zoo" PPT courseware 4

teaching objectives

1. Knowledge objectives: Let everyone understand the meaning of equations, the concepts of solutions to equations, and master the relationship between equations.

2. Ability goal: Combined with teaching, cultivate everyone’s practical learning attitude and scientific spirit of seeking truth from facts.

3. Emotional goals: Develop good study habits. Infiltrate the mathematical idea of ​​one-to-one correspondence.

review

The following equation can be solved by how the left and right sides of the equation can be deformed at the same time. What is the theoretical basis?

(1)X+9=18 (2)0.9+X=20.3

(3)X-7=12 (4)X-34=100

How many black storks are there in my country? How to write an equation?

There are only x3=1500 black storks left in our country.

Suppose there are x black storks existing in our country.

Column equation: 3χ=1500

Multiply or divide both sides of an equation by a number and the equation still holds

It is estimated that by 2010, the number of Siberian tigers in the country's largest Siberian tiger breeding base will reach 1,000, 100 more than three times the number in 2003. How many Siberian tigers were there in the breeding base in 2003?

Solution: Suppose there are χ Siberian tigers in the breeding base in 2003

3χ+100 = 1000

3χ+100－100 = 1000－100

3χ = 900

3χ÷3 = 900÷3

χ=300

Answer: In 2003, there were 300 Siberian tigers in the breeding base.

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"Into the Zoo" PPT courseware 6:

"Into the Zoo" PPT Courseware 6 Practice and see who remembers x+3=5 1.2x-2.5=3.5 The first subquestion: x=2 The second subquestion: x=5 Shanghai Wildlife Park is the first in China Home Safari. There are a total of 16 Siberian tigers and white tigers in the park. Among them, the Siberian tiger...

"Into the Zoo" PPT courseware 5:

"Into the Zoo" PPT Courseware 5 According to a report by CCTV International Channel on June 1, 2004, the number of Guizhou golden monkeys in Fanjingshan National Nature Reserve in Guizhou has increased from more than 600 in 1993 to more than 860. The number in 1993 + the increased number = the number in 2004. For example...

"Into the Zoo" PPT courseware 3:

"Into the Zoo" PPT Courseware 3 Solve the following equations Equation 3x-2.4=3.6 Solution: 3x-2.4+2.4=3.6+2.4 3x=6 3x3=..

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Qingdao Edition Fifth Grade Mathematics Volume 1 industry PPT template

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