Seventh, we will report the learning to the Mathematics Culture Festival, and the second round of the seventh grade. - Training Enrollment Network

Seventh, we will report the learning to the Mathematics Culture Festival, and the second round of the seventh grade.

1.5 12

2. Only one is listed here.

15,666

3.3

4. List two (should be the only solution)

or

5.72,36

6.6

7.+/-2,+/-3

8. I won't

9. As shown in the figure

10. 1:4

1 1. First time: 16 minutes. Second time: 25 minutes.

12. (1) (350 * 4 * 2+350+550+410+60 *1.5)/4 = 420 (yuan)

I won't

13. Son A 4 sheep 1 pig 2 cattle

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