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- \(\frac{4}{7}.\frac{5}{6}.\frac{5}{7}.\frac{5}{6}=\frac{4.5.5.5}{7.6.7.6}=\frac{500}{1764}=\frac{125}{441}\)
- \(\frac{1}{2:3}.\frac{1}{2}=\frac{1}{2:3.2}\)(Có thể đề thíu)
\(\frac{4}{7}x\frac{5}{6}+\frac{5}{7}x\frac{5}{6}\)
\(=\frac{5}{6}x\left(\frac{4}{7}+\frac{5}{7}\right)=\frac{5}{6}x\frac{9}{7}=\frac{45}{42}=\frac{15}{14}\)
\(\frac{1}{2}:3x\frac{1}{2}=\frac{1}{6}x\frac{1}{2}=\frac{1}{12}\)
C1: 2/3 x (4/5 x 5/6) = 2/3 x 2/3 = 4/9
C2: (2/3 x 4/5) x 5/6 = 8/15 x 5/6 = 4/9
\(\frac{2}{3}x\frac{4}{5}x\frac{5}{6}\)
\(=\frac{8}{15}x\frac{5}{6}\)
\(=\frac{4}{9}\)
\(\frac{12}{25}=0,4800\)
\(\frac{7}{5}=1,4000\)
\(\frac{13}{4}=3,2500\)
\(\frac{4}{5}+\frac{2}{7}+\frac{11}{5}+\frac{12}{7}+\frac{1}{5}\)
\(=\frac{4}{5}+\frac{11}{5}+\frac{1}{5}+\frac{2}{7}+\frac{12}{7}\)
\(=\frac{4+11+1}{5}+\frac{2+12}{7}\)
\(=\frac{16}{5}+\frac{14}{7}\)
\(=\frac{16}{5}+2=\frac{26}{5}\)
\(\frac{4}{5}+\frac{2}{7}+\frac{11}{5}+\frac{12}{7}+\frac{1}{5}\)
\(=\left(\frac{4}{5}+\frac{11}{5}+\frac{1}{5}\right)+\left(\frac{2}{7}+\frac{12}{7}\right)\)
\(=\frac{16}{5}+\frac{14}{7}\)
\(=\frac{16}{5}+2=\frac{16}{5}+\frac{10}{5}=\frac{26}{5}\)
a, \(\frac{12}{25}+\frac{3}{5}+\frac{13}{25}\)
\(=\left(\frac{12}{25}+\frac{13}{25}\right)+\frac{3}{5}\)
\(=1+\frac{3}{5}\)
\(=\frac{8}{5}\)
b, \(\frac{3}{2}+\frac{2}{3}+\frac{4}{3}\)
\(=\frac{3}{2}+\left(\frac{2}{3}+\frac{4}{3}\right)\)
\(=\frac{3}{2}+2\)
\(=\frac{7}{2}\)
c, \(\frac{3}{5}+\frac{7}{5}+\frac{3}{4}\)
\(=2+\frac{3}{4}\)
\(=\frac{11}{4}\)
nhớ ấn đúng giùm tớ nha
a) = 8 phần 5
b) = 7 phần 2
c) = 11 phần 4
nhớ ấn giùm tớ nha