-13.7 + (-5 + 2.7)
First, simplify -5 + 2.7 to -2.3 / Your problem should look like:
Second, simplify to get rid of the addition. / Your problem should look like:
Third, subtract. / Your problem should look like:

Answer:
-16 (B)
You have to add the mass of the superhero book and the dragon book 200+310=510
Answer: 15
explanation -2. -1. 0 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
you count from -2 to 13 on the number line
Answer:
The first zero after decimal point and 4 only
Step-by-step explanation:
Despite having 5 decimal points, the rules of significant figures dictate that unless there is a digit other than zero after, the only significant numbers are those that come before zero. For this case, the significant digits are only 0.04 but if it was 0.0400005 then all the other zeros would have also be considered significant.
Answer:
18
Step-by-step explanation:
10/0.5 = 20
20 * 0.9 = 18