Question

using appropriate property ​

Answer 1

Answer:RRRROSorrrrryyyy

Step-by-step explanation:

Answer 2

Answer:

» Using the commutative property of rational numbers,

$=\dfrac{2}{7} + \dfrac{-11}{14} + \dfrac{-13}{20} + \dfrac{3}{10}$

» Using the associative property of rational numbers,

$=(\dfrac{2}{7} + \dfrac{-11}{14}) + (\dfrac{-13}{20} + \dfrac{3}{10})$

» Now, converting the rational numbers in the brackets to those with the same denominators,

$=(\dfrac{4}{14} + \dfrac{-11}{14}) + (\dfrac{-13}{20} + \dfrac{6}{20})$

It's easier to solve the brackets now! :D

» Adding the numerators of the rational numbers in the bracket,

$=(\dfrac{4+(-11)}{14}) + (\dfrac{(-13)+6}{20})$

$=(\dfrac{-7}{14}) + (\dfrac{-6}{20})$

» Now, converting the rational numbers to those with the same denominators,

$=\dfrac{-70}{140} + \dfrac{-42}{140}$

$=\dfrac{(-70)+(-42)}{140}$

$=\dfrac{-112}{140}$

$=\dfrac{-4}{5}$

Thus, the answer is 4/5. :)

Explanation:

☆ The commutative property of rational numbers says that rational numbers can be added, or multiplied, in any order. Note that the rational numbers have to be subtracted or divided in the specified order or the answer would come incorrect.

Here, a + b = b + a.

☆ The associative property of rational numbers says that grouping rational numbers, in addition, or multiplication, and then solving, does not lead to an incorrect answer. This does not apply to subtraction or divsion.

Here, a + b + c = a + (b + c).