1. 5/3+(-1/5)
a. -22/5
b. -22/15
c. 22/15**
d. 28/15
2. Which property is illustrated by the statement?
(3+2.8)+5=3+(2.8+5)
a. Commutative Property of Addition
b. Commutative Property of Multiplication
c. Inverse Property of Multiplication
d. Associative Property of Addition **
1. No.
2. Why isn't a correct?
http://www.mathsisfun.com/associative-commutative-distributive.html
Is it b for number 1?
I'm sorry -- but you were right the first time. I should know better than try to do a math problem in my head.
5/3+(-1/5)
25/15 - 3/15 = 22/15
1. To compute 5/3 + (-1/5), you need to find a common denominator for the fractions. The common denominator is the least common multiple (LCM) of the denominators, which in this case is 15.
Multiply both the numerator and denominator of 5/3 by 5 to get 25/15.
Multiply both the numerator and denominator of -1/5 by 3 to get -3/15.
Now, you can add the fractions: 25/15 + (-3/15) = (25 - 3)/15 = 22/15.
Therefore, the answer is c. 22/15.
2. The property illustrated by the equation (3+2.8)+5=3+(2.8+5) is the Associative Property of Addition. This property states that when adding three or more numbers, the grouping of the numbers does not affect the sum. In other words, you can regroup the numbers in any way and still get the same result.
In the given equation, the numbers 3, 2.8, and 5 are being added together. The equation shows that you can first add 3 and 2.8, and then add the result to 5. Alternatively, you can first add 2.8 and 5, and then add the result to 3. In both cases, the sum is the same.
Therefore, the answer is d. Associative Property of Addition.