Joke Collection Website - Talk about mood - Tell me about your method of averaging.
Tell me about your method of averaging.
Average. Be sure to follow our definition: average = total quantity ÷ total number of copies.
For example, a classmate walks 800 meters from home to school. Walk every minute at school 100 meters. Walk 80 meters per minute when you go home and find the average speed when you go to school and go home.
Some students will work it out directly: (100+80) ÷ 2 = 90 (meters).
This algorithm is wrong.
Let's calculate the total distance first: 800 times 2 = 1600 (meter).
Then calculate the total time: 800 ÷100+800 ÷ 80 =18 (minutes).
Recalculate the average speed: 1600 ÷ 18 = 800/9 (meters).
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