My mother took me to a stationery store this evening. There are so many things here! I picked a lot of stationery: 3 math books, 3 composition books, 3 English books and 2 beautiful pens. I went to the front desk to check out, and the assistant aunt smiled and said to me, "Is that all?" Little beauty, a * * * 26.50. "I looked at her in surprise and said," Aunt, how did you work it out? Aunt said, "Little friend, this is very simple, a notebook 1. 5 yuan, Jiuben is 9x 1. 5= 13。 5 yuan. A pen is 6 pounds. 5 yuan, 2x6. 5= 13 yuan, which adds up to 26. 5 yuan. " I scratched my head and said, "auntie, we just started school and haven't learned the knowledge of grade five yet." We only learned the addition and subtraction of decimals and integer multiplication before. " Aunt said, "In fact, it can be calculated by integer multiplication." I said curiously, "Really? Teach me quickly. " Aunt said, "You put 1. If 5 is expanded to 10 times, it becomes an integer, 15x9= 135, and then 135 is reduced to the original 10/,which becomes 1 3. 5 yuan. Will you be a child? " I replied, "Yes, decimal multiplication is so simple!" " "Yes, decimal multiplication is as simple as that." Aunt added: "In fact, decimal multiplication is still used a lot in real life. Such as shopping, weighing, and so on. " I excitedly said thank you to menstruation. Then my mother and I left this stationery store.
I think I have gained a lot today. The assistant aunt not only taught me decimal multiplication, but also told me the application of decimal multiplication in life. I'm so happy!