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Authoritative PPT Summary
"Numbers and Shapes (2)" Mathematics Wide Angle PPT
Part 1: Knowledge Explanation
How to solve it cleverly?
1/4=1 /2×1 /2 , 1 /8=1/4 ×1 /2 , 1/16 =1 /8 ×1 /2 , 1 /32 =1 /16 ×1 /2 , 1/64 =1/32 ×1 /2 ……
We find that: starting from the second number, each number is "1" / "2" of the previous number.
We find that as we add them one by one, the fraction on the right side of the equal sign gets closer and closer to 1.
The denominator of the fraction on the right is the same as the denominator of the second fraction, and the numerator is 1 less than the denominator.
Number and Shape PPT, Part 2: Practice and Consolidation
1. Can you use what you have learned to solve the following problems?
2. A road is 200 meters long. Xiaoliang and his dog start from the starting point of the road at the same time at a uniform speed. When Xiaoliang walks halfway through the road, the dog has reached the end of the road. Then the dog returns to walk in the direction of Xiaoliang, and after meeting Xiaoliang, it runs to the end point. After reaching the end point, it walks in the direction of Xiaoliang again... until Xiaoliang reaches the end point. How many meters has the dog run since the start?
The speed of a dog is twice that of a human
200×2=400 (meters)
Answer: The puppy ran a total of 400 meters from the start.
Number and Shape PPT, Part 3: Knowledge Summary
For some problems, it is simpler and more intuitive to convert numbers and formulas into graphics by drawing and using graphics to solve them.
Number and Shape PPT, Part 4: Summary of Gains
Students, what knowledge have you learned in this class?
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"Numbers and Shapes" Mathematics Wide Angle PPT:
"Numbers and Shapes" Mathematics Wide Angle PPT Part 1 Content: Teaching New Knowledge Example 1: Observe the relationship between the following picture and the equation, and complete the equation. 1 = ( ) 1 + 3 = ( ) 1 + 3 +5 = ( ) Observe and follow the rules to complete the equation.
"Number and Shape (1)" Mathematics Wide Angle PPT:
"Numbers and Shapes (1)" Mathematics Wide Angle PPT Part 1: Interesting Introduction Observe, what is the relationship between the above picture and the following equation? Knowledge explanation There is a small square. When two numbers are added, there are 2 small squares on each side. When three numbers are added, there are 3 small squares on each side.