1) 7/18*(4/9+15/18)=7/18*19/18=133/18.
2) 23/1/5=5/23/1/5=23.
3) 3,54+0,5*1,3=3,54+0,65=4,19.
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Answers & Comments
1) 7/18*(4/9+15/18)=7/18*19/18=133/18.
2) 23/1/5=5/23/1/5=23.
3) 3,54+0,5*1,3=3,54+0,65=4,19.