6. Our use of electricity will be reduced to save money.

7. Tree and flowers will be planted by the student in the school garden next weekend.

8. A lot of garden will be spent by people in britain next year.

6. Our use of electricity will be reduced to save money.

7. Tree and flowers will be planted by the student in the school garden next weekend.

8. A lot of garden will be spent by people in britain next year.

6. Our use of electricity will be reduced to save money.

7. Tree and flowers will be planted by the student in the school garden next weekend.

8. A lot of garden will be spent by people in britain next year.

a, -2/7 + 2/7 : 3/5 = 0/7 :3/5 = 0/15

b, -8/19+-4/21 - 17/21 + 27/19 =4/21 -17/21+27/19 = -13/21+27/19 = 814/399

c.6/5 . 3/13 - 6/5 . 16/13 =18/65-6/5=18/65-78/65=-60/65