Question

verify the commutative law for rational numbers: 3/4 and -2/5
please give me the answer with the solution​

Answer 1

Answer:

• 7/20

Step-by-step explanation:

commutative law ( a+b ) = (b+a)

here, a= 3/4

b=-2/5

Let's come to the point

1) 3/4 + -2/5 (first change the denominators into like fractions)

=> L. C. M. of denominators 4,5 is 20

3x5/4x5=15/20

-2x4/5x4=-8/20

15/20 + -8/ 20 =7/20 ( as according to additive law (-)+(+) = subtract the numbers first and keep the sign of greatest number.)

so, answer for your question (if you asked about commutative law under addition, thiswere the answers.)