Question

Please!Urgent!
A si B!
Dau coronita +5 stele!
♔♔♔♔♔

Answer 1

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Answer 2

a) $3 \frac{6}{9} -( \frac{3}{9} - \frac{15}{90})-(2 \frac{75}{100} -2 \frac{3}{9})=$
$3 \frac{2}{3} - \frac{45}{90} -( \frac{3}{4}- \frac{1}{3})= \frac{11}{3} - \frac{1}{2}- \frac{5}{3}=$$\frac{6}{3}- \frac{1}{2}= \frac{3}{2}$
b) $\frac{3(1+2+...+100)}{2(1+2+...+100)} - \frac{1+2+...+100}{4(1+2+...+100)}= \frac{3}{2}- \frac{1}{4} = \frac{5}{4}$