Close? Keys? Words: I love 400 words in the fourth grade of mathematics primary school.

Words: 400 words composition

This article applies to: the fourth grade of primary school.

Composition source:

This composition is about 400 words in the fourth grade of primary school. The topic is "I love math". Everyone is welcome to contribute enthusiastically. Welcome to reading "Composition: I Love Mathematics", and "Composition Network" updates more excellent "Fourth Grade Composition" for you every day, so please pay attention!

I love math from: composition source: composition network zw.liuxue86.com math is always so wonderful, so magical, it is like my good friend, which makes me get a lot of happiness in my study.

Tonight, my mother and I compete to do oral arithmetic. After I finished, it took me 1 1 minute, while my mother only took 9 minutes. I asked my mother curiously, "How do you count so fast?" Mom said, "I use multiplication and division for simple operations." After my mother taught me this method, I suddenly realized that some calculation problems are like the face-changing of traditional Chinese opera. They always appear as ordinary faces, but there are hidden mysteries in their hearts. Take 450 ÷25 as an example!

We should use 450× 4 = 1800 first, then 25× 4 = 100, and finally1800 ÷100 =18. In division, divisor and divisor expand or contract the same coset at the same time. Using this property, many such calculation problems can be simplified. I'm really glad to try to do more correct questions.

As long as you understand the laws of mathematics and master its temper, you will be handy when doing problems.

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