soal ada di fto.. pake cara ya no ngasal btw klo dah 500 followers aku bkal sering² bikin quiz
[tex]{\sf{1.~2\dfrac{1}{4}\times2\dfrac{2}{5}=\textsf{\textbf{5}}\dfrac{\textsf{\textbf{2}}}{\textsf{\textbf{5}}}}}[/tex]
[tex]{\sf{2.~2\dfrac{2}{3}\times4\dfrac{1}{2}=\textsf{\textbf{12}}}}[/tex]
[tex]{\sf{3.~3\dfrac{1}{3}\times1\dfrac{2}{6}=\textsf{\textbf{4}}\dfrac{\textsf{\textbf{4}}}{\textsf{\textbf{9}}}}}[/tex]
[tex]{\sf{4.~1\dfrac{5}{7}\times2\dfrac{2}{3}=\textsf{\textbf{6}}\dfrac{\textsf{\textbf{6}}}{\textsf{\textbf{7}}}}}[/tex]
Pembahasan
–› No. 1
[tex]\begin{aligned}{\sf{2\frac{1}{4}\times2\frac{2}{5}}}&={\sf{\frac{2\times4+1}{4}\times\frac{2\times5+2}{5}}}\\&={\sf{\frac{9}{4}\times\frac{12}{5}}}\\&={\sf{\frac{108}{20}}}\\&={\sf{\frac{27}{5}}}\\&={\sf{5\frac{2}{5}}}\end{aligned}[/tex]
–› No. 2
[tex]\begin{aligned}{\sf{2\frac{2}{3}\times4\frac{1}{2}}}&={\sf{\frac{2\times3+2}{3}\times\frac{4\times2+1}{2}}}\\&={\sf{\frac{8}{3}\times\frac{9}{2}}}\\&={\sf{\frac{72}{6}}}\\&={\sf{\frac{12}{1}}}\\&={\sf{12}}\end{aligned}[/tex]
–› No. 3
[tex]\begin{aligned}{\sf{3\frac{1}{3}\times1\frac{2}{6}}}&={\sf{\frac{3\times3+1}{3}\times\frac{1\times6+2}{6}}}\\&={\sf{\frac{10}{3}\times\frac{8}{6}}}\\&={\sf{\frac{80}{18}}}\\&={\sf{\frac{40}{9}}}\\&={\sf{4\frac{4}{9}}}\end{aligned}[/tex]
–› No. 4
[tex]\begin{aligned}{\sf{1\frac{5}{7}\times2\frac{2}{3}}}&={\sf{\frac{1\times7+5}{7}\times\frac{2\times3+2}{2}}}\\&={\sf{\frac{12}{7}\times\frac{8}{2}}}\\&={\sf{\frac{96}{14}}}\\&={\sf{\frac{48}{7}}}\\&={\sf{6\frac{6}{7}}}\end{aligned}[/tex]
