Evaluate the following expressions.(with solution)
1. 23+(-6)
2. (-42)+(-9)
3. (-35)+8
4. (-12)-(+6)
5. (+25)-(+9)
6. (-15)×(+4)
7. (-3)×(+5)×(-4)
8. (+9)×(-6)
9. (+100)÷(-10)
10. (-225)÷(+25)
