Question

verify the following:-
1. -12\5+2/7=2/7+-12/5.
2.(3/4+-2/5)+-7/10=3/4+(-2/5+-7/10

give step by step explanation​

Answer 1

Answer:

Step-by-step explanation:

-12/5+2/7

-84/35 + 10/35 (LCM of 7 and 5 is 35)

(-84+10)/35 = -74/35

2/7+(-12/5)

10/35+(-84/35)  (LCM of 7 and 5 is 35)

(10-84)/35 = -74/35

.(3/4+-2/5)+-7/10

(15/20+-8/20)+-14/20   (LCM of 4,5 and 10 is 20)

7/20+-14/20 = -7/20

3/4+(-2/5+-7/10

15/20+(-8/20+-14/20) (LCM of 4,5 and 10 is 20)

15/20+-22/20= -7/20

Answer 2

Answer:

1. -12/5+2/7=2/7+-12/7 is not commutative property (3/4+-2/5)+-7/10=3/4+(-2/5+-7/10) is associative property now we can solve this. In this we should find wheater the two property
2. '12/5 ¥ -12/7 so it is not commutative
3. (3/4=3/4) (-2/5= + ( -2/5) ) (-7/10= + (7/10)) so the value of this sum is same