chán quá thì đi học đi :)

\(\frac65x\frac37=\frac{18}{35};\frac29x4=\frac89\)

81

uk ok

My favorite community helper is a firefighter. They wear a thick, fire-resistant uniform, big boots, and a helmet. They are incredibly brave and strong, and they're always ready to help. Firefighters do so much for our community. They risk their lives to put out dangerous fires and rescue people and animals trapped in emergencies. They also help educate people about fire safety. I really respect firefighters because they are heroes who work tirelessly to keep everyone safe. Their courage and dedication inspire me, and I'm very grateful for everything they do.