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Oblicz:
a) 1,2 x 5/2       4 1/4 :0,01
    -----------  :  ----------------
    0,16x 1/4     6,25x 4/25




b)  0,5+ 0,2x0,6  +   0,7+0,2x 1/4
-----------------     ------------------
3/4-7:10              0,7-0,4x1/2




c)   

3+2 1/2x0,3            4+0,1x10
--------------    x      -----------
3 3/4:(4,8-3x0,6)     1,6x5

.



Odpowiedź :

Catta1eya

[tex]a) \\\\\frac{1.2*\frac52}{0.16*\frac14}:\frac{4\frac14:0.01}{6.25*\frac4{25}}=\frac{\frac{6}{5}*\frac52}{\frac{4}{25}*\frac14}:\frac{\frac{17}4:\frac{1}{100}}{\frac{25}{4}*\frac4{25}}=\frac{\frac62}{\frac1{25}}:\frac{\frac{1700}{4}}{1}=\frac62*25*\frac4{1700}=\frac62*\frac4{68}=\frac61*\frac2{68}=6*\frac1{34}=\frac6{34}=\frac3{17}[/tex]

[tex]b) \\\\\frac{0.5+0.2*0.6}{\frac34-7:10}+\frac{0.7+0.2*\frac14}{0.7-0.4*\frac12}=\frac{0.5+0.12}{0.75-0.7}+\frac{0.7+0.05}{0.7-0.2}=\frac{0.62}{0.05}+\frac{0.75}{0.5}=12.4+1.5=13.9[/tex]

[tex]c)\\\\\frac{3+2\frac12*0.3}{3\frac34:(4.8-3*0.6)}*\frac{4+0.1*10}{1.6*5}=\frac{3+0.75}{3.75:3}*\frac{4+1}{8}=\frac{3.75}{1.25}*\frac58=3*\frac58=\frac{15}8=1\frac78=1.875[/tex]

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