I was stumped by an application problem when I was doing the problem today. The title of this question is: Xiaohua is 3 years old and Dad is 26 years old. A few years later, his father was three times as old as Xiaohua. I'm confused.
Then my mother came back and I asked her. Mom helped me analyze it: according to the conditions of this topic, the "age difference" between dad and Xiaohua this year is 26-4 = 24 (years old). Then draw a picture according to the relationship that "Dad is three times older than Xiaohua". The two of us began to draw.
After drawing the picture, I immediately understood that after several years, the "age difference" between them was still 24 years old. Then, according to the solution of the differential problem, we can find out Xiaohua's age in a few years, and subtract 2 years from Xiaohua's age in a few years to know how many years have passed.
The solution is: 26-2 = 24 years old.
24(3— 1)= 12 (years old)
12-2 = 10 (year)
A: 10 years later, my father is three times as old as Xiaohua.
Mom asked me to check again. 10 years later, is dad three times as old as Xiaohua?
(26+ 10)÷(2+ 10)=36÷ 12=3
Yeah! I got it right. It seems that you have to draw a picture first to do the problem, and you can see it at a glance when you draw it.