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Question

If x is equal to 1/10 and y is equal to (-3/8) 
Then what will be  x+y ,. x-y ,and x multiplied by y


Solution

x = 1/10
y = -3/8

x+y = 1/10 + (-3/8)
       = 1/10 - 3/8
       = (1*8 - 3*10) / 8*10         (Taking LCM)
       = (8 - 30) / 80
       = -22 / 80
       = - 11/40                             (Divide numerator and denominator with 2)

x-y = 1/10 - (-3/8)
      = 1/10 + 3/8
      = (1*8 + 3*10) / 8*10          (Taking LCM)
      = (8 + 30) / 80
      = 38 / 80
      = 19/40                             (Divide numerator and denominator with 2)

x multiplied by y = x*y
                            = 1/10 * 3/8
                            = 1*3 / 10*8
                            = 3/80

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