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\(\frac{7}{4}+\frac{4}{9}+\frac{26}{10}+\frac{12}{5}+\frac{9}{15}\)
\(=\frac{7}{4}+\frac{4}{9}+\frac{13}{5}+\frac{12}{5}+\frac{9}{15}\)
\(=\frac{79}{36}+\frac{13}{5}+\frac{12}{5}+\frac{9}{15}\)
\(=\frac{79}{36}+5+\frac{9}{15}\)
\(=\frac{79}{36}+\frac{28}{5}\)
\(=\frac{1403}{180}\)
\(\frac{9}{15}< \frac{9}{17}\)
\(\frac{12}{25}=\frac{36}{75}\)
\(\frac{17}{15}< \frac{5}{4}\)
\(\frac{6}{9}+\left(\frac{24}{15}:\frac{12}{9}:\frac{6}{15}\right)\)
\(=\frac{2}{3}+\left(\frac{24}{15}.\frac{9}{12}.\frac{15}{6}\right)\)
\(=\frac{2}{3}+\frac{24.9.15}{15.12.6}\)
\(=\frac{2}{3}+\frac{2.3.1}{1.1.2}\)
\(=\frac{2}{3}+3\)
\(=\frac{2}{3}+\frac{9}{3}\)
\(=\frac{11}{3}\)
Chúc bạn học tốt !!!
\(x+\frac{15}{7}=\frac{9}{2}\)
\(x=\frac{9}{2}-\frac{15}{7}=\frac{33}{14}\)
\(x-\frac{3}{4}=\frac{7}{2}\)
\(x=\frac{7}{2}+\frac{3}{4}=\frac{17}{4}\)
\(x.\frac{7}{8}=\frac{12}{5}\)
\(x=\frac{12}{5}:\frac{7}{8}=\frac{96}{35}\)
\(\frac{5}{6}:x=\frac{4}{3}\)
\(x=\frac{5}{6}:\frac{4}{3}=\frac{5}{8}\)
- a) x=9/2-15/7=33/14
- b) x=7/2+3/4=17/4
- c) x=12/5:7/8=61/35
- d) x=5/6:4/3=5/8
- k nha
a) \(\frac{2}{5}+\left(\frac{2}{8}+\frac{3}{5}+\frac{6}{8}\right)=\left(\frac{2}{5}+\frac{3}{5}\right)+\left(\frac{2}{8}+\frac{6}{8}\right)=1+1=2\)
b) \(\frac{6}{9}+\left(\frac{15}{25}+\frac{12}{9}+\frac{6}{15}\right)=\left(\frac{6}{9}+\frac{12}{9}\right)+\left(\frac{15}{25}+\frac{6}{15}\right)\)
\(=2+\left(\frac{3}{5}+\frac{2}{5}\right)=2+1=3\)
9/5-12/15=1
= \(\frac{27}{15}\)- \(\frac{12}{15}\)= \(\frac{15}{15}\)= 1
hok tốt