1. TÍNH NHẨM

14x10=140

1348x100=134800

5629x1000=5629000

18390 : 10=1839

328000 : 100=3280

378000 : 1000=378

14 x 10 = 140

1348 x 100 = 134800

5629 x 1000 = 5629000

18390 : 10 = 1839

328000 : 100 = 3280

378000 : 1000 = 378

Cho 1 like

âm 143

14.29+14.71+(1+2+3+...+2015)(199199.198-198198.199)

=14(29+71)+(1+2+3+...+2015)(199.1001.198-198.1001.199)

=14.100+(1+2+3+...+2015)0=1400+0=1400

14.(29+71)+(1+2+3+...999).0

14.100+(1+2+3...999).0

14000+(1+2+3+...999).0

Chú ý : số 0 luôn nhân với bao nhiêu thì vẫn bằng 0 

Nên tổng trên bằng 0

= 700 nha cái đồ giả mạo gái thành trai

=> 20 x ( 10 + 9 + 11 ) + 10 x ( 2 + 3 + 4 + 1 )

=> 20 x 30 + 10 x 10

=> 600 + 100

=> 700

20x10+20x9+20x11+10x2+10x3+10x4+10x1

=20x(10+9+11)+10x(2+3+4+1)

=20x30+10x10

=600+100

=700

\(20\cdot9+20\cdot90+20\)

\(=20\cdot\left(90+9+1\right)\)

\(=20\cdot100\)

\(=2000\)

20x9+20x90+20

=20x(9+90+1)

=20x100

=2000

K mik rùi mik k lại

20x9+20x90+20= 2000

k mik nha mik thề sẽ k cho các bn

100x9 + 100x10 + 2000

= 900+ 1000 +2000

= 1900 +2000

= 3900

100x9+100x10+2000

=100x9+100x10+100x20

=100x(9+10+20)

=100x39

=3900

100x9 + 100x10 +2000 = 900 + 1000 +2000 =3900

\(=1000+900+100\)

\(=1000+1000\)

\(=2000\)

=2000

tíck mik nhé

100 x 10 + 100 x 9 + 100

= 100 x 10 + 100 x 9 + 100 x 1

= 100 x (10 + 9 + 1)

= 100 x 20

= 2000

=1900 nha kb vs mk nè k mk nha bn

100x9+100x10=100x(10+9)=100x19=1900

100x9+100x10

=100x(9+10)

=100x19

=1900

= 100x(1+9+2-1)

= 100x11

= 1100

100+100x9+100x2-100

= 100*1+100x9+100x2-100*1

= 100 * (1+9+2-1)

= 100*   11

= 1100