3*-6.2=5836
3* =58.6 6.2
* = 1.6
2.
After solving *, the distance is still100km.
400-(60* 40*)= 100
100* =300
* =300÷ 100
* =3
3. b ~ ~ * months have passed (the last sentence of the question)
(50 5*)×2=88 12
2* = 12
* =6
A big problem.
1. Correct the error.
Step 2 be positive
positive
Step 4 be positive
Step 5 be positive
fail
7. Counter
Eighth place
9. positive
10 anti