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2)75% x 2,2 : 3 1/5 = 0,75 x 2,2 : 3,2 =0,515625
3)2 1/4 x 25% : 2,5 = 2,25 x 0,25 :2,5 = 0,225
4)3 1/4 x 13/5 x 3/4 = 3,25x 0,52x0,75 =1,2675
5)21%:15%x0,5 =0,7
6)0,15 :0,3 x 0,6 = 15/100 :3/10x 6/10 = 3/10
7) 1/2 x 1/3 x 1/4=0,0165
8)3/4:1/2x1/5 = 0,3
9)3/4:2/3:1/4= 4,5
10)1,2 :0,6 x 0,3 =12/10 : 6/10 x 3/10 =3/5