1)27/10*4=54/5=10.8
2)12.42/10.8=1.15
3)1.15+4.1=5.25
4)5.25*0.8=4.2
5)4.2-3.8=0.4
6)11*0.1=1.1
7)28-1.1-16.9=10
8)10*(4/25)=10*0.16=1.6
9)0.4/1.6=0.25
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Answers & Comments
1)27/10*4=54/5=10.8
2)12.42/10.8=1.15
3)1.15+4.1=5.25
4)5.25*0.8=4.2
5)4.2-3.8=0.4
6)11*0.1=1.1
7)28-1.1-16.9=10
8)10*(4/25)=10*0.16=1.6
9)0.4/1.6=0.25