A soccer team consists of girls from sixth, seventh, and eighth grades. If 4/10 of the girls on the team are eighth graders and 5/10 are seventh graders, what fraction of the girls ae either seventh or eighth graders?
4/10 + 5/10=9/10 are 7th or 8th graders.
To find the fraction of the girls who are either seventh or eighth graders, we need to add the fractions representing the seventh graders and the eighth graders.
Given that 4/10 of the girls on the team are eighth graders, we can take this fraction and add it to the fraction representing the seventh graders.
So, we have 4/10 (eighth graders) + 5/10 (seventh graders).
To add these fractions, we need to find a common denominator, which is 10 in this case since both fractions have a denominator of 10.
Next, we add the numerators of the fractions:
4/10 + 5/10 = 9/10
Therefore, the fraction of girls who are either seventh or eighth graders is 9/10.