1. 1).2 1/7-1 1/5=15/7-7/5=(75-49)/35=26/35
2). 33/10:26/35=33/10*35/26=21/4=5,25
3. 4-5,25=-1,25
2. 0,215(1-1,6)/(-0,3)= 0,215(-0,6)/(-0,3) =0,43
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Answers & Comments
1. 1).2 1/7-1 1/5=15/7-7/5=(75-49)/35=26/35
2). 33/10:26/35=33/10*35/26=21/4=5,25
3. 4-5,25=-1,25
2. 0,215(1-1,6)/(-0,3)= 0,215(-0,6)/(-0,3) =0,43