Đáp án + Giải thích các bước giải:
$a)\dfrac{3}{2}=\dfrac{3×5}{2×50}=\dfrac{150}{100}$
$b)\dfrac{2}{5}=\dfrac{2×20}{5×20}=\dfrac{40}{100}$
$c)\dfrac{777}{700}=\dfrac{777÷7}{700÷7}=\dfrac{111}{100}$
$d)\dfrac{639}{300}=\dfrac{639÷3}{300÷3}=\dfrac{213}{100}$
`e)frac{12}{24}=\frac{12÷2}{24÷2}=\frac{1}{2}=\frac{1×50}{2×50}=\frac{50}{100}`
`g)\frac{1818}{1515}=\frac{1818÷101}{1515÷101}=\frac{18}{15}={18÷3×20}/{15÷3×20}=\frac{120}{100}`
$\text{#Study Well}$
