10 + 20 + 20 + 20 + 20 + 20 + 90 + 80 + 70 + 60 + 50 + 40 + 20 + 10

= 10 + (20 x 6) + (90 + 10) + (80 + 20) + 70 + (60 + 40)

= 10 + 120  + 100 + 100 + 70 + 100

= 530

10 + 20 + 20 + 20 + 20 + 20 + 90 + 80 + 70 + 60  + 50 + 40 + 20 + 10

= 10 + (20 x 5) + (90 + 10) + (80 + 20) + 70 + (60 + 40) + 50

= 10 + 100 + 100 + 100 + 70 + 100 + 50

= 530

tính bằng cách thuận tiện nhất :

10 + 20 + 20 + 20 + 20 + 20 + 90 + 80 + 70 + 60 + 50 + 40 + 20 + 10 .

= ( 10 + 20 ) + ( 20 + 20 ) + ( 20 + 20 ) + ( 90 + 80 ) + ( 70 + 60 ) + ( 50 + 40 ) + ( 20 + 10 )

= ( 30 + 40 ) + ( 40 + 170 ) + ( 130 + 90 ) + 30

= ( 70 + 210 ) + ( 220 + 30 )

= 280 + 250

= 530

50 nha bn iu dấu^^

mk đầu tin ớ

50 nha bạn

=50 nhé bạn 

k mik đi

Kết quả bằng 0

h nhá

10 -20 = 80 - 20 = 60 + 50 = 110 + 60 = 170 - 70 = 100 - 100 = 0 + 90 = 90 - 80 = 10 - 10 = 0

đáp số : 0

10+10x10+20x1=130 nha

K mình nha

= 130 nha bn 

 chúc bn hot giỏi nha!

10+10 x10+20 x1=130

-30

Chúc bạn học tốt 

k mình nha các bạn

x + 10 = -20

x = -20 - 10

x = - 30

mk k rui nha,kb lun nha

x+10=-20

x=-20+10

x=-10

tk nha

hom qua minh tk ban roi

Số cần tìm là:

20 000 000 x 1 = 20 000 000

Vậy kết quả vẫn không thay đổi

Đáp số:.....

20000000 tk mình nha

Bằng 20 000 000. k cho mình nha bạn!

100 mk nhanh 

10 x 10 = 100

10 x 10 = ?

10 x 10 = 100 

sorry bn nha ! mk hết lượt rồi !

10^20=1000...000(có 20 chữ số 0 )

     vì 10^x=100...0

                  x chữ số 0

10^20=10000...(20 chữ số 0)

10 ^ 20 = 100000.... ( 20 chữ số 0 )

Ủng hộ tíck mik nha

the name of my best friend is Nhi.She is my good friend and cares for me a lot.She behaves me well and helps always.I met her in class 6 and became best friend.She is my true friend because she understands me very well and cares every need.I her very much.I never had any friend her ever before.She come to my home and i too go to her home.Our parents respects us very much and our friendship.she is so precious for me and I never want to lose her.Whenever I get absant in the classroom,she helps me in doing all the left homeworks and classworks

My name is _____. I'm ______years old. I have a best friend.She name is _______ . My friend has a well-proportioned body.she is very pretty and bright. Because she's has a kind and gentle nature ought to everyone badly to love my best friend and me too.

Tk cho mình nhé