1.with

2.from

3.go

4.are

5.ate

6.field

7.leaved

8.a lot of

For mother:

I celebrate this day for you mom,just want to tell you.You took care of and rasied me since the day I was a baby until now.Every moment I grow up,that is your happiness.You happy when I said the word "mom",happy when I go to shool.......But I know every time you take care of me,it is very difficult.And now,it's time I repay the effort that you give me,mom.I know I am very naughty and always scolded you,I'm very sorry,forgive me please.I promise you I will take care of you like you was do.Happy 8-3 mom,I LOVE YOU very much and I hope you always beautiful,healthy and you will live forever with me,mom.

Hiệu là:

5x2+1=11

Số bé là:

(2009-11):2=999

Số lớn là:

999+11=1010

Đáp số:999 và 1010

tổng là 95 mình vừa làm xong vòng 1 của lớp 6 mình được 300 điểm

C

Ta có:

+) AOC=AOD+DOC

AOC=30+40

AOC=70

+) COB=AOB-AOC

COB=90-70

COB=20

+) DOB=DOC+COB

DOB=40+20

DOB=60

+) Vì góc KOB và BOI là 2 góc kề bù nên

KOB=180-45=135 độ

+) Vì góc AOI và KOA là 2 góc kề bù nên

AOI=180-120=60 độ

+) Vì tia OI nằm giữa 2 tia OA và OB nên

BOI+AOI=BOA

45+60=BOA

BOA=45+60

BOA=105

Vậy góc KOB=135,AOI=60,BOA=105