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Grade three math scoring method+exercises
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How to List the Equations and Relationships of P5 Answers in Primary Mathematics Improvement Training (Grade Six)

Reward score: 0- analysis time: 2007-10-123:12.

It's too difficult. I don't know much about the latter. Please help me:

1.3 years ago, Teacher Zhang was five times as old as Xiao Fang. Five years later, Miss Zhang is three times as old as Xiao Fang. How old is Teacher Zhang's Xiao Fang this year?

2. Two athletes, A and B, are running on a circular track with a circumference of 400 meters. It is known that B walks 80 meters per minute on average, the speed of A is 1.25 times that of B, and A is in front of B 100 meters. How many minutes does A lag behind to catch up with B?

.............................................................

The following omission

Questioner: hiwe-the best answer during the probation period

These are all age problems and travel problems. You can draw pictures to solve it. If you can't, just look at the answer. If you don't understand, ask again.

Respondent: 6734908 18- tong sheng level 9- 12 19:26.

The evaluation has been closed, and there are currently 1 comments.

okay

100% (1) is not good

0% (0)

relevant issues

Where is the exercise of linear function in grade two?

Other answers *** 3

1, suppose Xiao Fang is x years old this year, three years ago, Xiao Fang x-3, Teacher Zhang 5*(x-3), five years later, Xiao Fang x+5 Teachers 5*(x-3)+8.

(x+5)*3=(x-3)*5+8

x= 1 1

Teacher Zhang 5*(x-3)+3=43

2. The speed difference is 80*( 1.25- 1)=20.

Distance difference 400- 100=300

300/20= 15 points

Respondent: Zhang kzhu 1970- Juren Level 5 9- 13 10:04.

Teacher Zhang is 43 years old and Xiao Fang 1 1 year old.

400-100 = 300m1.25-1= 0.2580 * 0.25 = 20m300/20 =15 minutes.

Respondent: Tong Sheng Yi Ji 9- 15 13:00.

Teacher Zhang is 43 years old and Xiao Fang 1 1 year old.

Interviewee: zzy 152- apprentice magician level 2 9- 17 20:27 Best answer comments:

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