Question

What is the sum of the following equation? (2 points)

three tenths plus thirty-nine hundredths equal blank

A. thirty-six hundredths
B. forty-two hundredths
C. sixty-nine hundredths
D. ninety-six hundredths

Answer 1

sixty nine hundredths

Explanation:

three tenths can be expressed in decimal as 3/10

thirty nine hundredths can be expressed in decimal as 39/100

Therefore the sum of three tenths plus thirty nine hundredths equals

3/10 +39/100

We first find the l.c.m of the two fractions equals 100 so we have 100 as the denominator

then 100 divided by 10 multiplied by 3 +100 divided by 100 multiplied by 39 as illustrated below gives the answer

3/10 +39/100

=30+39/100

=69/100= sixty nine hundredths