The most economical mathematical problem of telephone bill - Training Enrollment Network

The most economical mathematical problem of telephone bill

Card A:100 ÷ [(100+20) ÷ 0.35] =100 ÷ (120×100/35) =

Card B: 80 ÷ [(80+20) ÷ 0.35] = 80 ÷ (100×100/35) = 80× 35 ÷100 ÷.

So 0.291667-0.28 = 0.011667 ≈ 0.01is a penny.

A: One card is cheap, about 1 cent per minute.

Related articles

Worked as a teacher in Peking University Mathematics Department.

What are the most difficult and frustrating knowledge points in high school mathematics?

Where is the Chinese version of mathematical software MATLAB R2020a for mac installed!

The question and answer of the first-grade mathematics equation with one yuan (the questions can be made up by yourself or searched online) is good, and extra points are given.

The scale of running the third senior middle school in Wuxi

Which glass of water is most suitable for children's large class math teaching plan?

Brief introduction of Shantou Overseas Chinese Middle School

What are the applications of mathematics in life?

How to connect the home set-top box with the health super math TV?

What is the significance of geometry in mathematics?