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The answers to the exercises on page 4 of the first volume of the seventh grade mathematics textbook published by People's Education Press.
Answer: People's Education Edition, seventh grade mathematics textbook, Volume 1, exercise questions, page 4, answer:

1. Solution: omit reading,

Positive numbers are: 2.5, +4/3,120;

The negative number is:-1, -3. 14, - 1.732,-2/7.

2. Answer: Walk 60 meters west. ..

3.-3 0

4.+ 126 (or 126)-150

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