Question

How many significant figures are in each of these problems
-2000+20.5
-106.2+54.07

Answer 1

• 3 significant figures

Explanation:

Problems given:

• - 2000 + 20.5 = - 1979.5 ≈ -1980.0 ⇒ 3 significant figures
• - 106.2 + 54.07 = - 52.13 ≈ -52.1 ⇒ 3 significant figures

Zeros at the end are not counted as significant figures