Math diary 400 words: the problem of distance
This afternoon, we went to the library to see the pocket science and technology exhibition. We had to take a taxi because dad was not at home.
There is a little black box in the middle of the front row of the taxi. After the driver's uncle put down the sign that said "empty car", there was a creaking typing sound in the box with several red numbers beating on it. I am curious. My mother told me it was called one meter. I asked my uncle again, how does it calculate the price? My uncle spoke patiently: "Every city has a starting price for taxis. Our starting price in Ningbo is 10 yuan, and we can drive 3.5 kilometers. Add the fuel surcharge 1 yuan, which is 1 1 yuan. " "How about more than 3.5 kilometers?" Uncle said, "Within 10 km, every kilometer in 2 yuan, and outside 10 km, every kilometer in 3 yuan. How much should you pay if the car has just driven 10 km? " My mother and I walked from 3.5 km to10 km:10-3.5 = 6.5 (km), 6.5×2= 13 (yuan), plus the starting price 1 1 yuan, I have to pay.
Mom said, "We used to take a taxi to grandma's house and spent 33 yuan. Can you calculate how far our home is from grandma's? "
I thought about it, 33 yuan > 24 yuan, and this distance definitely exceeds 10 km. Calculate the excess first, and then calculate the excess distance, 33-24=9 (yuan), 3 yuan after 10 km, 9÷3=3 (km), plus the previous 65438+.
Yes, I got it right! Students, will you forget?