"Problem Solving" Gram and Kilogram PPT

Description

"Problem Solving" Gram and Kilogram PPT

Part One: Learning Objectives

1. Further establish the mass concept of grams and kilograms, become familiar with the application of mass units grams and kilograms in life, and be able to use mass units grams and kilograms to express the mass of objects.

2. Introduced from life situations, raise questions, let students master the mass units grams and kilograms through activities, communication, and operations, and experience the close connection between mathematics and life.

[Key Points] Combined with practical problems in life, students can further understand the practical significance of kilograms and grams.

[Difficulty] Master the method of estimating the quality of items.

Gram and kilogram PPT, part 2 content: classroom analysis

What units of mass did you know in the last class? What's the relationship between them?

We know grams and kilograms, and we also know that 1 kilogram = 1000 grams.

Divide into groups and weigh out 1 kilogram of different items, then count how many there are.

Our group weighed 5 medium-sized apples as 1 kilogram and 4 large apples as 1 kilogram.

Approximately 15 eggs are 1 kg.

Grandma Wang picked 20 apples. How many kilograms do they weigh?

What do you know? What is the problem to be solved?

I know that Grandma Wang picked 20 apples.

Need to estimate how much these apples weigh.

Grams and Kilograms PPT, Part 3: Classroom Exercises

1. If 5 pears weigh 1 kilogram, these pears weigh approximately ( ) kilograms.

5 pears are about 1 kilogram. We can subtract 5 by 5. How many 5s can be subtracted from 24 is how many 1 kilograms there are. Subtract four 5's and that's 4 kilograms, leaving 4 pears, which is nearly 1 kilogram.

2. Fill in the appropriate mass unit in ( ).

150( ) 4 ( ) 450 ( ) 100 ( )

3. Fill in ○ with ">", "<" or "=".

5300kg○5300g 8kg○8000g

1kg○5300g 62kg○6200g

1kg ○ 800g 350g ○ 10g

4. Fill it out.

5 200 grams is 1000 grams, 1 kilogram = 1000 grams.

An apple weighs 200 grams, a peach weighs 500 grams, and a bar of soap weighs 250 grams.

5. Below is the price list of several fish species in the aquatic product market.

(1) Uncle Li bought a 2 kilogram grass carp at the fish market. How much did he spend?

2 kilograms = 2000 grams

2000÷500=4

4×5=20 (yuan)

Oral answer: Uncle Li spent 20 yuan.

(2) Aunt Zhang bought a carp for a total of 36 yuan. How many kilograms does this carp weigh?

36÷6=6

6×500=3000 (grams)

3000 grams = 3 kilograms

Oral answer: This carp weighs 3 kilograms.

Objects may be large or small, and the number or mass of the object must be estimated based on the size.

After knowing the overall quantity and overall weight, you can use division or subtraction to find the individual weight.

Keywords: Free download of PPT courseware for mathematics in the second volume of the second grade of the People's Education Press, download of problem-solving PPT, download of grams and kilograms PPT, .PPT format;

For more information about the "Solving Problems in Grams and Kilograms" PPT courseware, please click the Solving Problems PPT Grams and Kilograms PPT tab.

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Update Time: 2024-11-18

This template belongs to Mathematics courseware People's Education Press Second Grade Mathematics Volume 2 industry PPT template

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