1) 2 1/2 : 4/5 - 3/10 = 2) 4 3/5 + 1 2/3 x 1 1/9 = 3) 10 3/5 - 5 2/5 : 1 4/5 = 4) 3 2/5 x ( 1 1/2 - 3/4 ) = 5) ( 6 3/5 + 3 3/5 ) : (3 1/2 - 1 1/4) = Tolong ya..

1) (2 1/2: 4/5)- 3/10
=(5/2 :4:5)-3/10
=(5/2 x5/4)-3/10
=(5x4/5x2)-3/10
=25/8 - 3/10
=125/40 - 12/40
=113/40 = 2 33/40

2) 4 3/5 +(1 2/3 x 1 1/9)
=4 3/5 +(5/3 x 10/9)
=23/5 + (5x9/10x3)
=23/5 + 45/30
= 138/30 + 45/30
=61/10 = 6 1/10

3) 103/5 - (5 2/5 : 1 4/5)
= 103/5 - (27/5 : 9/5)
= 103/5 - (27/5 x 5/9)
= 103/5 - (27x9/5x5)
= 103/5 - 243/25
= 515/25 - 243/25
= 272/25 = 10 22/25

4) 3 2/5 x(1 1/2 - 3/4)
=3 2/5 x (3/2 - 3/4)
= 17/5 x (6/4 - 3/4)
= 17/5 x 3/4
= 17x4/3x5
= 68/15 = 4 8/15

5) (6 3/5 + 3 3/5) : (3 1/2 - 1 1/4)
=(33/5 + 18/5) : (7/2 - 5/4)
=51/5 : (14/4 - 5/4)
= 51/5 : 9/4
= 51/5 x 4/9
= 51x9/4x5
= 459/20 = 22 19/20