"I exercise, I am healthy" PPT courseware 7

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"I exercise, I am healthy" PPT courseware 7

How to find a more complex average problem?

Zhang Qiang: (98+95+96+92+95+96+99)÷7

Li Ying: (95+96+98+97+96+98+99)÷7

Cui Tian: (92+94+96+95+97+93+98)÷7

Put a "√" after the correct equation

(1) Xiao Li processes a batch of parts. He processes 28 parts in the first 2 hours and 36 parts in the next 3 hours. How many parts are processed per hour on average?

A. (28+36)÷(2+3) ( )

B. (28×2+36×3)÷(2+3)( )

C. (28+36)÷2 ( )

(2) A car drives from point A to point B. It travels an average of 60 kilometers per hour in the first five hours and an average of 56 kilometers per hour in the next three hours. How many kilometers per hour does this car travel from point A to point B on average?

A. (60+56)÷(5+3) ( )

B. (60+56)÷2 ( )

C. (60×5+56×3)÷(5+3) ( )

The average height of the six members of the basketball team is 182 centimeters. After adding one new member, the average height of the players is now 1 centimeter shorter than before. How tall is this new player?

(182-1)×(6+1)-182×6

=181×7-1092

=1267-1092

=175 (cm)

Answer: The height of this new player is 175 centimeters.

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Qingdao Edition Fourth Grade Mathematics Volume 2 industry PPT template

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