Can you please check my answer?
Marcia wants to make muffins and needs 3/4 cup of a cup of sugar. She discovers, however,that she has only 2/3 of a cup of sugar. How much more sugar does she need?
my answer: 1/12 of a cup
Right.
To check your answer, we need to find the difference between the amount of sugar Marcia has (2/3 cup) and the amount she needs (3/4 cup).
To do this, we subtract the amount she has from the amount she needs:
3/4 cup - 2/3 cup = (9/12 cup) - (8/12 cup) = 1/12 cup
So, your answer is correct! Marcia needs 1/12 cup more sugar.
To check if your answer is correct, let's calculate the difference between the amount of sugar Marcia needs and the amount she already has.
First, let's convert the fraction 3/4 to an equivalent fraction with a denominator of 12 (which is the least common multiple of 4 and 3):
3/4 = 9/12
Marcia has 2/3 of a cup of sugar. To make the denominators equivalent, we need to convert this to a fraction with a denominator of 12 as well:
2/3 = 8/12
Now we can calculate the difference between the amount of sugar Marcia needs and the amount she already has:
9/12 - 8/12 = 1/12
Your answer of 1/12 cup is correct! Marcia needs an additional 1/12 cup of sugar to make the total amount she needs for the muffins. Well done!