yeah so its been so long since ive done these kind of problems and its irritating the hell out of me...
1. 2 1/2 * 3 and 1/2 * 1 1/12 =
2. 2 1/2 * ( 3 2/5 divided by 4)
3. Find the area of the triangle when base is 3 and height is 1 1/2
4.Compare the total number of calories in the two cans of tomatoes (can 1 has 45 calories, can 2 has 25 calories).
5. Compare the total amount of sodium in the two cans of tomatoes (can 1 has 560mg with 23% daily value, can 2 has 300mg with 12% daily value).
if anyone can help me out with these it would be much appreciated...thanks!
1. 2 1/2 * 3 and 1/2 * 1 1/12 =
2. 2 1/2 * ( 3 2/5 divided by 4)
3. Find the area of the triangle when base is 3 and height is 1 1/2
4.Compare the total number of calories in the two cans of tomatoes (can 1 has 45 calories, can 2 has 25 calories).
5. Compare the total amount of sodium in the two cans of tomatoes (can 1 has 560mg with 23% daily value, can 2 has 300mg with 12% daily value).
if anyone can help me out with these it would be much appreciated...thanks!
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The easiest way is to first convert the mixed numbers to improper fractions:
a b/c = (ac + b) / c
4 2/3 = (4 * 3 + 2) / 3 = (12 + 2) / 3 = 14 / 3
Then multiply, so in the 2nd one (because I have no idea how to interpret the 1st one as you wrote it):
(2 1/2) * ((3 2/5) / 4)
((2 * 2 + 1) / 2) * (((3 * 5 + 2) / 5) / 4)
(5 / 2) * ((17 / 5) / 4)
Do what is in the parenthesis 1st (remember when dividing fractions, you multiply by the reciprocal)
(5 / 2) * ((17 / 5) * (1 / 4))
(5 / 2) * ((17 * 1) / (5 * 4))
(5 / 2) * (17 / 20)
(5 * 17) / (2 * 20)
85 / 40
17 / 8
Convert back to mixed number
2 1/8
For number 3, remember that the area of a triangle is (1/2)bh
For numbers 4 and 5, I have no idea what is being asked here as it seems there is missing data (like the size of the cans or something)
a b/c = (ac + b) / c
4 2/3 = (4 * 3 + 2) / 3 = (12 + 2) / 3 = 14 / 3
Then multiply, so in the 2nd one (because I have no idea how to interpret the 1st one as you wrote it):
(2 1/2) * ((3 2/5) / 4)
((2 * 2 + 1) / 2) * (((3 * 5 + 2) / 5) / 4)
(5 / 2) * ((17 / 5) / 4)
Do what is in the parenthesis 1st (remember when dividing fractions, you multiply by the reciprocal)
(5 / 2) * ((17 / 5) * (1 / 4))
(5 / 2) * ((17 * 1) / (5 * 4))
(5 / 2) * (17 / 20)
(5 * 17) / (2 * 20)
85 / 40
17 / 8
Convert back to mixed number
2 1/8
For number 3, remember that the area of a triangle is (1/2)bh
For numbers 4 and 5, I have no idea what is being asked here as it seems there is missing data (like the size of the cans or something)