9.)
4/5 x 1/2 + 3/5.
4/10 + 3/5.
4/10 + (3.2/5.2)
4/10 + 6/10
10/10 = 1.
10.)
1 1/4 - 85% + 0,3.
5/4 - 85/100 + 3/10.
5/4 - 17/20 + 3/10.
(5.5/4.5) - 17/20 + (3.2/10.2).
25/20 - 17/20 + 6/20.
8/20 + 6/20
14/20 = 7/10
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9.)
4/5 x 1/2 + 3/5.
4/10 + 3/5.
4/10 + (3.2/5.2)
4/10 + 6/10
10/10 = 1.
10.)
1 1/4 - 85% + 0,3.
5/4 - 85/100 + 3/10.
5/4 - 17/20 + 3/10.
(5.5/4.5) - 17/20 + (3.2/10.2).
25/20 - 17/20 + 6/20.
8/20 + 6/20
14/20 = 7/10