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[tex] \frac{15}{18} - \frac{2}{9} - \frac{1}{6} = \frac{11}{18} - \frac{1}{6} \\ = \frac{4}{9} [/tex]
[tex]7 \frac{12}{15} - \frac{5}{10} = \frac{117}{15} - \frac{5}{10} \\ = \frac{39}{5} - \frac{1}{2} \\ = \frac{78}{10} - \frac{5}{10} \\ = \frac{73}{10} \\ = 7 \frac{3}{10}[/tex]
100% - 50% - 25% = (100 - 50 - 25)% = (50-25)% =25%
0,076 - 0,005 =76/1000 - 5/1000 = 71/1000 = 0,071
1 - 1/2 - 25%
= 1/2 - 25/100
= 1/2 - 1/4
= 1/4
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