1)7,5+5,3=12,8
2)12,8-21/4=12,8-5,25=7,55
3)13/6*3/13=2
4)5,7*40/19=57/10*40/19=3*4=12
5)66/7*7/11+2,9=6+2,9=8,9
6)31-7,4=23,6
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Answers & Comments
1)7,5+5,3=12,8
2)12,8-21/4=12,8-5,25=7,55
3)13/6*3/13=2
4)5,7*40/19=57/10*40/19=3*4=12
5)66/7*7/11+2,9=6+2,9=8,9
6)31-7,4=23,6