一共多少钱?
yígòng duōshao qián?
How much in total?
今天几号?
What's the date today?
The question is: 今天 (jīntiān) "today" + 几号 (jǐ hào) "what date." 几 (jǐ) means "what/how many," and 号 (hào) means "day of the month."
Ask this when you want to know the date, like the 15th or 3rd. It's casual and common. Note that 几号 asks for the day of the month, not the weekday. For the weekday, you'd ask 今天星期几?(jīntiān xīngqī jǐ?)
“What's the date today?” in Chinese is 今天几号? (jīntiān jǐ hào?).
今天几号? is pronounced jīntiān jǐ hào?.
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