diện tích mảnh vườn :17;5x7;25=126;875 

diện tích mảnh trồng hoa : 3x3x3;14=28;26

diện tích còn lại;126;875-28;26=98;165

moi hok lop 6

Phân số  chỉ phần đã tô đậm trong  hình  dưới đây là

A.  4 3

B.  3 4

C.  4 7

D.  6 9

1.77-22=55

2.235+125=360

3.124-114=10

15-(x-5)=-1

(x-5)=15+1

x-5=16

x=21

1. Our exercises are corrected at home by the teacher.

2. Ali’s mother was worried by his absence.

3. Several new schools are being built in our town.

4. Great progress has been made in industry, science and medicine.

5. A lion was killed by Sam last week.

6. Your report must be handed in before the end of this month.

7. The job had just been finished when the factory closed.

8. That box hasn’t been opened for the past hundred years.

9. Are these letters going to be mailed soon?

10. The report shouldn’t have been finished yesterday.

11. Researches on SIDA began to be carried out by scientists two years ago.

12. He is said to be the richest man in our town. / It is said that he is the richest man in our town.

13. You can be assured everything will be arranged in time.

14. We are to pity rather than these homeless boys are despised.

15. Nothing has been moved since you were sent away to be cured.

số bé nhất có 2 chữ số là 10

số bé nhất có 1 chữ số là 1

nên hiệu của chúng sẽ là: 10-1=9