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2) 3/4 x 1/2 x 2/5
= 6/40
= 3/20
3) 4/5 x 2,5 x 40%
= 0,8 x 2,5 x 0,4
= 0,8
4) 1/4 x 1 1/3
= 1/4 x 4/3
= 4/12
= 1/3
5) 2 2/3 x 1 3/5
= 8/3 x 8/5
= 64/15
= 4 4/15
6) 2 2/5 x 3 1/4 x 1 1/2
= 12/5 x 13/4 x 3/2
= 468/40
= 11 28/40
= 11 7/10
7) 5 x 2/5
= 10/5
= 2
8) 1/2 : 1/5
= 1/2 x 5/1
= 5/2
= 2 1/2
9) 3/4 : 4
= 3/4 x 1/4
= 3/12
= 0,25
10) 3 3/4 : 1 1/2 : 1/4
= 15/4 : 3/2 : 1/4
= 15/4 x 2/3 : 1/4
= 30/12 x 4/1
= 120/12
= 10