20-3/8+32-1/4=? 45-6/8-32-2/8=?

Question

For the first i got 49.888

Answer 1

20-(3/8)+32-(1/4)

(19 5/8)+32-(1/4)

(51 5/8)-(1/4)

(51 5/8)-(2/8)

51 3/8

 

45-(6/8)-32-(2/8)

(44 2/8)-32-(2/8)

(12 2/8)-(2/8)

12

or...

45-32-1 because (-6/8)-(2/8)=-8/8=-1

13-1

12

Answer 2

Don't use a calculator.

 

20 - 3/8 + 32 - 1/4

 

     = (20 + 32) + (-3/8 - 1/4)

     = 52 + (-3/8 - 2/8)

     = 52 - 5/8

     = 51 ³/₈

 

45 - 6/8 - 32 - 2/8

 

     = (45 - 32) + (-6/8 - 2/8)

     = 13 + (-8/8)

     = 13 - 1

     = 12