Plis di jawab a sampe e..harus pake cara

[tex]a.) \frac{2}{15} -\frac{1}{2} + \frac{3}{10} = \frac{4-15}{30}+ \frac{3}{10}= \frac{-11+9}{30}=- \frac{2}{30} \\ \\ b.) \frac{3}{7}+ \frac{4}{21} - \frac{13}{14}= \frac{9+4}{21}- \frac{13}{14}= \frac{13}{21}- \frac{13}{14}= \frac{26-39}{42}= -\frac{13}{42} \\ \\ c.) 4 \frac{2}{5} -1 \frac{1}{3} +2 \frac{3}{4}=(4-1+2)+( \frac{2}{5} -\frac{1}{3} +\frac{3}{4})=5+( \frac{24-20+45}{60})\\ \\=5 \frac{49}{60}[/tex]
[tex]\\ \\d.) 10 \frac{1}{4}+1 \frac{2}{3}+20 \frac{7}{8}=(10+1+20)+( \frac{1}{4}+ \frac{2}{3}+ \frac{7}{8}) =31+( \frac{6+16+21}{24}) \\ \\ = 31\frac{43}{24} \\ \\ e.) 2.25+25^o/_o+1 \frac{1}{2}=2 \frac{1}{4}+ \frac{25}{100} + 2\frac{1}{2}=(2+2)+( \frac{1}{4}+ \frac{25}{100} + \frac{1}{2}[/tex][tex]\\ \\=4+( \frac{25+25+50}{100})=4+ \frac{100}{100} =4+1=5[/tex]