[tex]Zad. 1\\a) \frac14+0.7=0.25+0.7=0.95\\\\b) \frac12-0.4=0.5-0.4=0.1\\\\c) \frac38-0.15=0.375-0.15=0.225\\\\d) \frac18+2.5=0.125+2.5=2.625\\\\e) 1\frac14*0.3=\frac54*\frac3{10}=\frac14*\frac32=\frac38=0.375\\\\f) \frac25:0.08=\frac25:\frac8{100}=\frac25*\frac{100}8=\frac11*\frac{20}4=\frac{20}4=5\\\\g) \frac15*0.6=\frac15*\frac6{10}=\frac6{50}=\frac{12}{100}=0.12\\\\h) 1\frac34:0.4=\frac74:\frac4{10}=\frac74*\frac{10}4=\frac72*\frac54=\frac{35}8=4\frac38=4.375[/tex]
[tex]Zad. 2\\a) \frac23+0.6=\frac23+\frac6{10}=\frac{20}{30}+\frac{18}{30}=\frac{38}{30}=1\frac8{30}=1\frac4{15}\\\\b) 4.2-1\frac19=4\frac1{5}-1\frac19=4\frac{9}{45}-1\frac{5}{45}=3\frac4{45}\\\\c) 3.6-1\frac12=3.6-1.5=2.1\\\\d) 2\frac13:0.8=\frac73:\frac4{5}=\frac73*\frac54=\frac{35}{12}=2\frac{11}{12}\\\\e) 5.2*\frac27=5\frac15*\frac27=\frac{26}5*\frac27=\frac{52}{35}=1\frac{17}{35}\\\\f) 0.6:\frac23=\frac3{5}*\frac32=\frac9{10}\\\\g) 2\frac3{20}+1.27=2\frac{15}{100}+1.27=2.15+1.27=3.42\\[/tex]
[tex]h) 0.65:6\frac12=\frac{13}{20}:\frac{13}2=\frac{13}{20}*\frac2{13}=\frac1{10}*\frac11=\frac1{10}\\\\i) 4.5-\frac34*\frac13=\frac{9}{2}-\frac14=\frac{18}{4}-\frac14=\frac{17}4=4\frac14\\\\j) (1\frac25+0.5):2=(1.4+0.5):2=1.9:2=0.95\\\\k) \frac58*4.2-\frac14=\frac58*\frac{21}{5}-\frac14=\frac18*\frac{21}1-\frac14=\frac{21}8-\frac48=\frac{17}8=2\frac18\\\\l) \frac47*(0.2+\frac14)=\frac47*(\frac15+\frac14)=\frac47*(\frac{4}{20}+\frac{5}{20})=\frac47*\frac9{20}=\frac{1}{7}*\frac9{5}=\frac9{35}[/tex]
