Zhang Lingzhi and I go home together after school. On our way home, we saw many telephone poles, so we asked Zhang Lingzhi to have a look. He looked at them and suddenly his eyes lit up and said, "Why don't I test you a question?" I said happily, "I'd love to!" " "

Zhang Lingzhi said, "Let's move on from here. There are 36 poles here, and the distance between every two poles is12m. Can you calculate the distance from the first pole to the last pole? " I picked up a pen and paper and calculated it. I said to Zhang Lingzhi, "You can multiply 36 by 12, which is equal to 432 meters." But Zhang Lingzhi said, "Is the first pillar also12m?" At this moment, it dawned on me that there was no interval for the first one, and the correct formula was 35 times 12 equal to 420 meters. Zhang Lingzhi said, "Yes, what do you think?" I said, "If there are 36 telephone poles, there are 35 sections, and each section is12m, so the total length should be multiplied by the number of sections. The number of intervals is 35, and the number of intervals is 12 meters, so the above formula is obtained. "

Zhang Lingzhi said to me, "It seems that you are good at math." After that, Zhang Lingzhi and I went back to our respective homes together.

Find out with your heart, sometimes there are many math problems in life that make us suddenly realize.