A math club has a secret way of accounting, when the income of 300 yuan is recorded as - 240 yuan, when the use of 300 yuan is recorded as + 360 yuan, guess, when they use 100 yuan How much is it possible to record? Why?

A math club has a secret way of accounting, when the income of 300 yuan is recorded as - 240 yuan, when the use of 300 yuan is recorded as + 360 yuan, guess, when they use 100 yuan How much is it possible to record? Why?

First, find the zero point: the income is negative, and the use is positive
Income 300 should be recorded as - 300 and the title as - 240, so zero point is income 60 yuan
The following is easy to understand, use 300 as + 300 and add 60 as + 360
Take 100 as + 100 and add 60 as + 160

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