1. This dress is more expensive than that one

-> that dress is ......................

that dress is not...................

that dress is less...................

2. she dances more beautifully and more safely than i do

-> i am......................

3. Ba is taller than Nam

-> Nam is not as.............

4. no house in my neighbouhood is older than this one

-> this house...................

5. This is the most interesting book i've ever read

-> i've never...............

6. Ba speaks English more fluently than me

-> i speak...........

i don't speak..........

Ta nhóm các thừa số có tổng là 10:

1 + 9 + 2 + 8 + 3 + 7 + 4 + 5 + 5

= ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 5 + 5 ) + 4

= 10 + 10 + 10 + 10 + 4

= 10 x 4 + 4

= 40 + 4

= 44

(a-b)^2-(b-a)(a+b)

Tìm x , y , z biết : 3x + y = 4 - x

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