Close? Keys? Words: 600 words in the sixth grade of math diary Primary School.
Words: 600 words composition
This article applies to: the sixth grade of primary school.
Composition source:
This composition is a 600-word composition about the sixth grade of primary school. The title is math diary. Everyone is welcome to contribute. Welcome to read the composition: math diary. The composition network updates more excellent fourth-grade compositions for you every day, so please pay attention!
Math diary: Today, my father and I came to Huatang Commercial Building. First, let's buy clothes for dad. My father chose a dress that he particularly liked. It's just a 20% discount on the National Day special. My father asked me the price of a dress is 150 yuan. A 20% discount is equivalent to the price of a dress multiplied by 0.8. Do you know how much a dress costs? I think: 150*0.8, first consider 0.8 as 8, then calculate the result by integer multiplication, and finally see how many decimal places a factor * * * has, so start from the right of the product number and point to the decimal point. The result is 120 yuan. I replied excitedly that the price of this dress after 20% discount was 120 yuan. Dad asked me again, "Usually when one number is multiplied by another, the product must be greater than the factor, but why is the product of this question greater than one of the factors?" I think, in class, the teacher said. I said confidently, "The product of a number multiplied by more than 1 is less than the original number. Dad said, that's a coincidence. So is there such a rule for division? " "Of course, when the dividend is greater than 0 and the divisor is greater than 1, the quotient is less than the dividend. When the dividend is greater than 0 and the divisor is less than 1, the quotient is greater than the dividend. " Dad said, "Then I'll test you again. How much is the current price of this dress at a 50% discount in 200 yuan? " My quick answer: "100 yuan". Dad said happily, "My daughter has learned to draw inferences from others!
After buying clothes, we went to the underground supermarket. My dad told me: "The dairy products in the store are all on sale. If you buy two boxes, how much discount? " I said, "I don't know." Dad said, "buy two and get one free, that is, spend two boxes of money to buy three boxes of milk." A box of 50 yuan is equivalent to spending 1 yuan on 150 yuan's milk. Then dividing 100 by 150 is equivalent to his discount. The result was about 30% off. You got it? "I said," I see. "I find that mathematics is used to solve problems in life more and more!
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