- Eating a lot of vegetables is good for your healthy.
- Exercise helps for good healthy.
- If you eat many sweets, you are bad healthy. 

 

1. haven't begun  2. invited/didn't come  3.made  4. haven't seen/have left 5. collected 6. have known 7. hurt 8. goes

a) 3/4.x-1/2 =3/7    3/4.x=3/7-1/2    3/4.x=-1/14  x=-1/14:3/4  x=-2/21

b) 2/7+(x-3/5)=-1/2   x -3/5=2/7+(-1/2)   x-3/5=-3/14  x=(-3/14)+3/5  x=27/70.
c) bạn viết chữ mik ko hiểu nên không giải bạn nhé !

1. eats 2. does 3. studies 4. watches 5. drinks 6. see 7. makes 8. learns 9. tidies 10. plays 11. wakes 12. takes 13. teaches 14. brushes 15. lose 16. kisses 17. catches 18. swims 19. carries

-35 E Q vì nó là 1/-35 = -1/35 đó.

a) (-2/3+3/7) : 4/5 + ( -1/3+4/7) : 4/5 = (-2/3+3/7).5/4+(-1/3+4/7).5/4= (-2/3+3/7+(-1/3)+4/7).5/4 = ((-2/3+(-1/3)) + (3/7+3/7) .5/4 = 1 + 1 . 5/4 = 2.5/4 = 2.5/1.4 = 5/2.

b) 5/9 : (1/11-5/22) + 5/9 : (1/15-2/3) = 9/5 . (1/11-5/22) + 9/5. (1/15-2/3) = 9/5. (1/11-5/22+1/15-2/3) = 9/5 . (-3/22)+(-3/5)= 9/5 . (-81/110) = -792/550.

phần b mik hông cóa chắc 

ủa ? rồi câu hỏi đou?????

a) -2/7 . 21/8 = -2.7.3/7.2.4 = -3/4.
b) 0,24 . -15/4 = 24/100 . (-15/4) = 6/25 . (-15/4) = 2.3.(-3).5/5.5.2.2 = -9/10.

c) (-2) . (-7/12) = -2/1 . (-7/12) = (-2) . 7/1.2.6 = -7/6 . 

d) (-3/25) : 6 = (-3/25):6/1 = (-3/25) . 1/6 = -3/120 = -1/4 .