Question

d- 1 + {15/4 - [6/8 : (1/2 + 3/4)]} =

Answer 1

1+(15/4-(6/8:(1/2+3/4)=  mmc de 2,4=4
1+(15/4-(6/8:(2+3=5/4)
1+(15/4-(6/8x4/5)
1+(15/4-3/5)    mmc 5,4=20
1+(75-12=63/20)
1+63/20=  20+63
-----------------------=83/20
                  20