Jawabanmu

2014-08-25T15:00:30+07:00
2014-08-25T15:12:14+07:00
A.  \frac{2}{15} -  \frac{1}{2} +  \frac{3}{10} =  \frac{4}{30} -  \frac{15}{30} +  \frac{9}{30} = -  \frac{2}{30} = -  \frac{1}{15}

b. 44 \frac{2}{5} - 1 \frac{1}{3} +  \frac{3}{4} =  \frac{22}{5} -  \frac{4}{3} +  \frac{3}{4} =  \frac{264}{60} -  \frac{80}{60} +  \frac{45}{60} =  \frac{229}{60} = 3 \frac{49}{60}

c. 2,25 + 25 % + 1 \frac{1}{2} = 2,25 + 0,25 + 1,5 = 4

d.  \frac{7}{30} +  \frac{3}{20} - 4 \frac{1}{4} =  \frac{14}{60} +  \frac{9}{60} -  \frac{255}{60} = - \frac{232}{60} = - 3 \frac{52}{60} = -  3\frac{13}{15}