mohon guys dijawab bsok dikumpul gawat guys nggak ngerti sya .. tolong

Semoga membantu y........

a.) ( 2 x 2 1/4 ) + 1 1/2 - 5/6
= ( 2 x 9/4 ) + 3/2 - 5/6
= 9/2 + 3/2 - 5/6
= 31/6 = 5 1/6

b.) 2 1/4 x ( 3 x 1 1/2 ) : 5/6
= 9/4 x ( 3 x 3/2 ) : 5/6
= 9/4 x 9/2 x 6/5
= 9/4 x 9 x 3/5
= 243/20
= 12 3/20

c.) ( 2 1/4 x 1 1/2 ) : ( 1 1/2 x 5/6 )
= ( 9/4 x 3/2 ) : ( 3/2 x 5/6 )
= 27/8 : ( 3/2 x 5/6 )
= 27/8 : ( 1/2 x 5/2 )
= 27/8 : 5/4
= 27/8 x 4/5
= 27/8 x 1/5
= 27/10
= 2 7/10