December 2018 1 11 Report
Oblicz:
a)  6\frac{1}{4} *(17 \frac{2}{5} -12 \frac{3}{5} )
b) 16 \frac{2}{3} :7 \frac{1}{7} +2 \frac{6}{7} :1 \frac{11}{14}

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