| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Fifth Grade Mathematics Volume 1 | pptx | 6 MB |
"Problem Solving" Decimal Multiplication PPT Courseware
Description
"Problem Solving" Decimal Multiplication PPT Courseware
teaching objectives
1. Experience the process of independently solving real-life problems and applying laws to perform simple decimal operations.
2. Be able to use the knowledge of decimal multiplication to solve simple practical problems, and be able to apply the laws of operation to perform simple operations on decimals.
3. Actively participate in mathematics activities and gain successful experience in applying existing knowledge to solve practical problems.
Aunt Li plans to buy 1 bag of flour, 2 kilograms of beef, and 2 kilograms of fish. She brought 200 yuan. Is it enough?
Think about it: How to calculate it?
Method 1: First calculate how much it costs to buy beef and fish, then calculate how much it costs to buy flour, beef, and fish, and finally compare it with 200 yuan.
Step by step calculation
46.4×2=92.8 (yuan)
23.6×2=47.2 (yuan)
42＋92.8＋47.2＝182 (yuan)
182＜200 is enough.
Comprehensive formula
46.4×2＋23.6×2+42
＝92.8＋47.2+42
＝182 (yuan)
182＜200 is enough.
Method 2: First calculate how much it costs to buy 1 kilogram of beef and 1 kilogram of fish, then calculate how much it costs to buy flour, beef, and fish, and finally compare it with 200 yuan.
Step by step calculation
46.4+23.6=70 (yuan)
70×2=140 (yuan)
42+140＝182 (yuan)
182＜200 is enough.
Comprehensive formula
(46.4+23.6)×2+42
=70×2+42
＝182 (yuan)
182＜200
Answer: Aunt Li brings enough money.
practice
1. Lili’s family needs 2 bags of milk every day. How much cheaper is it to buy a whole month’s milk than to buy it for a month (a month is calculated as 30 days)? What about a year?
0.95×2×30-55.8＝57-55.8＝1.2 (yuan)
1.2×12=14.4 (yuan)
Answer: It is 1.2 yuan cheaper per month and 14.4 yuan cheaper per year.
2. On Sunday, Xiao Ming and his mother took a taxi to his grandma’s house. How much should I pay when getting off the bus?
(9-3) × 1.5 + 8 = 6 × 1.5 + 8 = 9 + 8 = 17 (yuan)
Answer: You should pay 17 yuan when you get off the bus.
Keywords: decimal multiplication teaching courseware, problem-solving teaching courseware, Hebei Education Edition fifth grade mathematics volume PPT courseware download, fifth grade mathematics slide courseware download, decimal multiplication PPT courseware download, problem solving PPT courseware download, .PPT format;
For more information about the "Solving Problems in Decimal Multiplication" PPT courseware, please click on the "Solving Problems in Decimal Multiplication ppt" ppt tag.
"Problem Solving" PPT courseware download:
"Problem Solving" PPT courseware download Part One: New Lesson Introduction The hare and the tortoise are racing. The distance from the starting point to the end is 450 meters. Who will reach the end first? How early should I arrive? I run 5 meters per minute. I run 5 meters more per minute than the turtle. The tortoise and the hare..
"Problem Solving" PPT download:
"Problem Solving" PPT download Part 1: Concise explanation of classic questions 1) Do the math yourself: How much is the price reduction for each piece of clothing? The price of the wool sweater is reduced by 145 yuan, 525-380=145 (yuan). The price of the down jacket of 560 yuan is reduced by 162 yuan, 560-398=162 (yuan). What about the other items? ..
"Problem Solving" PPT:
Contents of the first part of "Problem Solving" PPT: Learning objectives 1. Understand the meaning of integer division; 2. Understand division with remainders; 3. Master the relationship between the various parts of division with remainders; 4. Cultivate analysis, judgment and logical reasoning Ability and ability to solve practical problems...
File Info
Update Time: 2024-07-11
This template belongs to Mathematics courseware Hebei Education Edition Fifth Grade Mathematics Volume 1 industry PPT template
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