Question

Match each expression to the correct number of significant figures.27.65?1320-----?213.1 + 4.823200?4

Answer 1

Non-zero digits are always significant.

27.65 => 4 significant figure

13.1+4.8 = 17.9 => 3 significant figures

Trailing zeroes are not significant, except when there is a decimal point in the number.

320 => 2 significant figures

200 => 1 significant figure