$$3 : 10 12 : 12 = ? ? = 50$$
$\text{false}$
$$\frac{3}{10}\times 12=600$$
$$\frac{3\times 12}{10}=600$$
$$\frac{36}{10}=600$$
$$\frac{18}{5}=600$$
$$\frac{18}{5}=\frac{3000}{5}$$
$$\text{false}$$
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