2. Verify the following: `-12/7 + 2/5 = 2/5 + -12/7`

Verify the following: (i) 3/7 times (5/6 + 12/13) = (3/7 times 5/6) + (3/7 times 12/13)

Verify the following: (i) (-12)/(5)+(2)/(7)=(2)/(7)+(-12)/(5) (ii) (-5)/(8)+(-9)/(13)= (-9)/(13)+(-5)/(8) (iii) 3+(-7)/(12)=(-7)/(12)+3 (iv) (2)/(-7)+(12)/(-35)=(12)/(-35)+(2)/(-7)

What is wrong in the following? 7/4 + 5/2 = 7/4 + 5/2 = 12/6 = 2

Verify each of the following: (i) ((5)/(7)xx (12)/(13))xx(7)/(18)= (5)/(7) xx ((12)/(13)xx(7)/(18)) (ii) (-13)/(24)xx((-12)/(5)xx(35)/(36))=((-13)/(24)xx(-12)/(5))xx (35)/(36) (iii) ((-9)/(5)xx (-10)/(3)) xx (21)/(-4) = (-9)/(5) xx ((-10)/(3) xx (21)/(-4))

Verify the following: (i) ((3)/(4)+(-2)/(5))+(-7)/(10)=(3)/(4)+((-2)/(5)+(-7)/(10)) (ii) ((-7)/(11)+(2)/(-5))+(-13)/(22)=(-7)/(11)+((2)/(-5)+(-13)/(22)) (iii) -1+((-2)/(3)+(-3)/(4))=(-1+(-2)/(3))+(-3)/(4)

Verify the following:- (ii) (-15)/(4)times((3)/(7)+(-12)/(5))=((-15)/(4)times(3)/(7))+((-15)/(4)times(-12)/(5)) .

Verify each of the following: (i) (3)/(7)xx(-5)/(7) = (-5)/(9)xx(3)/(7) (ii) (8)/(7) xx (13)/(9) = (13)/(9) xx (-8)/(7) (iii) (-12)/(5)xx (7)/(-36) = (7)/(-36) xx (-12)/(5) (iv) -8 xx (-13)/(12) = (-13)/(12)xx(-8)

Find the mean deviation about the mean for the following data : 9,2,7,10,5,12,4,7

mean deviation about median for the following data 2,5,7,2,4,6,10,12,5

Find the wrong number in each of the following series. 12,6,7.5,12.75,27.5,71.25