"Fast Logistics and Transportation" PPT courseware

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"Fast Logistics and Transportation" PPT courseware

1. Situation introduction

How many meters is it from the station to the logistics center?

How many kilometers is it between Xicheng and the logistics center? What about Dongcheng?

How many kilometers are there between the east and west cities?

●The motorcycle departs from the station and arrives at the logistics center in 8 minutes.

●Two trucks departed from the east and west cities at the same time, heading towards each other, and met at the logistics center after 4 hours.

What mathematical information do you know from the picture?

What questions can you ask based on this information?

2. Cooperation and exploration

Can you talk about the relationship between distance, speed and time?

A motorcycle travels an average of 900 meters per minute and can travel 7,200 meters in 8 minutes.

900 meters/minute × 8 minutes = 7200 meters

Speed ​​× time = distance

A motorcycle travels 7,200 meters in 8 minutes, averaging 900 meters per minute.

7200 meters ÷ 8 minutes = 900 meters/minute

distance ÷ time = speed

The distance from the station to the logistics center is 7,200 meters. The motorcycle travels an average of 900 meters per minute and takes 8 minutes to arrive.

7200 meters ÷ 900 meters/minute = 8 minutes

distance ÷ speed = time

3. Independent practice

1. First talk about the relationship between speed, time and distance, and then fill in the table below.

2. Two trains leave from the east and west at the same time and meet each other 5 hours later. The speed of car A is 110 km/h, and the speed of car B is 100 km/h. Find the distance between east and west. (First draw a picture to sort out the conditions and questions, and then answer them)

(110 + 100) × 5 110 × 5 + 100 × 5

= 210 × 5 = 550 + 500

= 1050 (kilometer) = 1050 (kilometer)

Think about it, how are these three questions related to the questions above?

(1) Two engineering teams A and B lay pipelines in the east and west directions from the same location. Team A lays 140 meters of pipes every day, and Team B lays 150 meters of pipes every day. After 5 days, how many meters of pipeline have been laid by the two engineering teams? (First draw a picture to sort out the conditions and questions, and then answer them)

(140 + 150) × 5 = 290 × 5 = 1450 (meters)

(2) The two teams started construction from both ends at the same time and opened in August. How many meters long is this tunnel?

(150+ 120) × 8 = 270 × 8 = 2160 (meters)

(3) Two people started recording a manuscript at the same time and finished recording in exactly one hour. A's typing speed is 80 words/min, and B's typing speed is 65 words/min. How many more words did A enter than B?

(80 - 65) × 60 = 15 × 60 = 900 (pieces)

The quantitative relationship and solution ideas are basically consistent with the encounter problem.

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"Fast Logistics and Transportation" PPT courseware 2:

"Fast Logistics and Transportation" PPT Courseware 2 Xiaohong walked from home to school for 10 minutes, walking 60 meters per minute. How many meters is Xiaohong's home from the school? 6010=900 (meters) distance = speed time Which one do you think is better? Why? 656+756 (65+75) 6..

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Update Time: 2024-09-10

This template belongs to Mathematics courseware Qingdao Edition Fourth Grade Mathematics Volume 1 industry PPT template

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