"Happy Farm" PPT courseware 5

"Happy Farm" PPT courseware 5
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Qingdao Edition Fourth Grade Mathematics Volume 2 pptx 6 MB
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"Happy Farm" PPT courseware 5

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"Happy Farm" PPT courseware 5

Class goals:

1. In the process of solving problems, discover and understand the distributive law of multiplication through mathematical activities such as observation, conjecture, verification, induction, and reasoning. (emphasis)

2. Be able to flexibly use the distributive law of multiplication to perform simple calculations. (difficulty)

3. Enhance the awareness of using symbols to express mathematical rules and appreciate the simplicity and beauty of mathematics.

observe

(5+4)×6=5×6+4×6

(9+2)×6=9×6+2×6

(5+2)×6=5×6+2×6

(9+4)×6=9×6+4×6

guess

Does this rule hold true?

in conclusion

(a+b) × c=a × c+b × c

distributive law of multiplication

(a+b)×c=a×c+ b×c

(a-b) × c and a × c- b × c? ?

(a+b)×c=a×c+ b×c

(a+b+x+y+……)×c and a×c+ b×c+x ×c+……? ?

(a+b)×c=a×c+ b×c

(a+b)÷c and a÷c+b÷c? ?

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"Happy Farm" PPT courseware 7:

"Happy Farm" PPT courseware 7

1. Situation introduction

There are 56 hollies, 72 willows, and 28 poplars.

How many saplings were purchased in total?

There are 80 roses, 88 peonies, and 112 camellias.

How many flower seedlings did you purchase in total?

Based on this information, you can...

"Happy Farm" PPT courseware 6:

"Happy Farm" PPT courseware 6

1. Situation introduction

Purchased 20 bags of flower soil, 25 bags per bag, 2 kilograms per bag.

How many kilograms of flower soil were purchased in total?

Purchased 10 bags of flower fertilizer, 8 bags per bag, 5 kilograms per bag.

How many kilograms of flower fertilizer were purchased in total? ..

"Happy Farm" PPT courseware 4:

"Happy Farm" PPT courseware 4

1. Situation introduction

Each bookshelf has 6 levels. There are an average of 125 books per floor.

There are 8 bookshelves.

How many books are there in this library?

What questions can you ask based on this information?

2. Cooperation and exploration...

File Info

Update Time: 2024-11-20

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"Happy Farm" PPT courseware 5
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