7. a)
[tex] \frac{71}{100} - \frac{25}{100} = > \frac{71 - 25}{100} = \frac{46}{100} [/tex]
b)
[tex] \frac{83}{100} - \frac{38}{100} - \frac{25}{100} = > \frac{83 - 3 8 - 25}{100} = \frac{20}{100}[/tex]
c)
[tex] \frac{43}{100} + \frac{48}{100} - \frac{54}{100} = > \frac{43 + 48 - 54}{100} = \frac{37}{100} [/tex]
d)
[tex] \frac{48}{100} - \frac{19}{100} = > \frac{48 - 19}{100} = \frac{29}{100} [/tex]
e)
[tex] \frac{100}{100} - \frac{25}{100} - \frac{50}{100} = > \frac{100 - 25 - 50}{100} = \frac{25}{100} [/tex]
f)
[tex] \frac{36}{100} - \frac{18}{100} + \frac{67}{100} = > \frac{36 - 18 + 67}{100} = > \frac{85}{100} [/tex]
8. a)
[tex]x + \frac{25}{100} = \frac{58}{100} = > x = \frac{58}{100} - \frac{25}{100} = > x = \frac{58 - 25}{100} = > x = \frac{33}{100} [/tex]
b)
[tex] \frac{100}{100} - x = \frac{25}{100} = > x = \frac{100}{100} - \frac{25}{100} = > x = \frac{100 - 25}{100} = > x = \frac{75}{100} [/tex]
c)
[tex] \frac{75}{100} - x = \frac{37}{100} = > x = \frac{37}{100} + \frac{75}{100} = > x = \frac{37 + 75}{100} = > x = \frac{112}{100} [/tex]
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Sper că n-am greșit nimic!
