"Multiplying decimals by integers" Decimal multiplication and division PPT courseware

Description

"Multiplying decimals by integers" Decimal multiplication and division PPT courseware

teaching objectives

In this lesson we will mainly learn how to multiply decimals by integers. Students must master the calculation method of multiplying decimals by integers and be able to correctly calculate related calculation problems.

Can you use the knowledge we have learned before to calculate how much "0.8×3" is equal to?

0.8×3 is the sum of three 0.8s added together.

0.8 yuan is 8 cents

8×3=24 cents

24 jiao = 2 yuan 4 jiao = 2.4 yuan

So 0.8×3=2.4 (yuan)

Discuss in the group how to calculate multiplication of decimals and integers?

Summary: To multiply decimals and integers, first calculate by integer multiplication, then look at how many decimals the factors have, and how many decimals the product has. Count how many decimals there are from the right side of the product, and click on the decimal point.

I am a little judge, I decide what is right and what is wrong.

1. To calculate decimal multiplication, align the same digits. ( )

2. The product of 0.46×7 is two decimal places, and the product of 46×0.7 is also two decimal places. ( )

3. The numbers 0.25×4 and 25×0.4 are equal. ( )

4. Because 37×3=111, so 0.37×3=11.1. ( )

After Xiaohua saw a flash in the distance, he heard thunder after 3 seconds. It is known that the speed of thunder propagating in the air is 0.33 kilometers per second. How far is the flash from Xiaohua? (The time from the flash to the time when the flash is seen is omitted)

0.33×3=0.99(km)

Answer: The place where the collision happened is 0.99 kilometers away from Xiaohua

There are 25 kilograms of gasoline in the car's fuel tank, and each kilogram of gasoline can help the car travel 6.8 kilometers.

6.8 ×25=170 (km)

170 kilometers<200 kilometers

Answer: This car needs to be refueled midway.

Keywords: Decimal multiplication and division courseware, decimal multiplication by integers courseware, Jiangsu Education Edition fifth grade mathematics volume PPT courseware download, fifth grade mathematics slide courseware download, decimal multiplication and division PPT courseware download, decimal multiplication by integers PPT courseware download, .PPT Format;

For more information about the PPT courseware "Multiplying Decimals by Integers, Multiplication and Division of Decimals", please click the Multiplying Decimals by Integers ppt Multiplication and Division of Decimals ppt tag.

"Multiplying Decimals by Integers" Decimal Multiplication Flash Animation Courseware 2:

"Multiplying Decimals by Integers" Flash Animation Courseware for Multiplying Decimals 2 This courseware is a teaching material for multiplication of decimals in the second unit of the fifth grade mathematics volume of the Hebei Education Edition. The content is vivid and vivid. Please download it! Keywords: decimal multiplication teaching courseware,...

"Multiplying Decimals by Integers" Decimal Multiplication PPT Courseware 7:

"Multiplying decimals by integers" PPT courseware for multiplying decimals by integers 7 Teaching objectives 1. Combined with specific examples, experience the process of solving problems with your own methods and learn the calculation method of multiplying decimals by integers. 2. Understand and master the calculation method of multiplying decimals by integers, and be able to multiply decimals correctly..

"Multiplying decimals by integers" Multiplication of decimals PPT courseware 6:

"Multiplying Decimals by Integers" Decimal Multiplication PPT Courseware 6 Oral Calculation: Carefully observe each set of questions, what did you find? 3X2= 5X4= 30X2= 5X40= 300X2= 5X400= 3000X2= 5X4000= One factor remains unchanged, and the other factor is expanded 10 times, 100 times, 1000 times. Then...

File Info

Update Time: 2024-10-17

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

Preview