kate is using fraction strips to add 4/10 and 4/5 she uses one whole strip to represent the sum. how many fifths strips does she need to complete the sum?
A. 1
B. 2
C. 5
D. 8
To find the sum of 4/10 and 4/5, we need to first find a common denominator. The common denominator for 10 and 5 is 10, so we need to convert the fractions to have a denominator of 10.
To convert 4/10 to a fraction with a denominator of 10, we multiply the numerator and denominator by 1:
(4/10) * (1/1) = (4/10)
To convert 4/5 to a fraction with a denominator of 10, we multiply the numerator and denominator by 2:
(4/5) * (2/2) = (8/10)
Now that we have the fractions with the same denominator, we can add them:
(4/10) + (8/10) = (12/10)
Now, we need to represent this sum using one whole fraction strip. One whole strip represents a denominator of 10, which means we already have one fifth strip from the fraction 12/10.
Therefore, the answer is A. 1