\(=\dfrac{99\cdot44.44\cdot2\cdot13.20\cdot4}{3.3\cdot88.88\cdot2\cdot6.6\cdot8\cdot5}=\dfrac{99}{3.3}\cdot\dfrac{1}{2}\cdot2\cdot\dfrac{1}{2}\cdot\dfrac{1}{5}=30\cdot\dfrac{1}{5}=6\)

123456 + (x - 1) =123456 +2005

123456 + x - 1 =125461

123455 + x       =125461

              x       =125461-123455

             x        =2006

123456 + (x - 1) =123456 +2005

=              (x-1)=2005

=              x-1=2005

                 x=2005+1=2006

              vậy x = 2006

=57x58+[42x(132-75)]

=57x58+42x57

=57x(58+42)

=57x100

=5700

Cảm ơn Bá Đức nhé!

1+5+3+9+5+7=30

Bằng 30 nha

k Đúng cho mình nhá

30 nhe bn

123456+123456=246912

123456+123456=123456x2=246912

đúng ko pn

123456 + 123456 = 246912

chúc bn học giỏi!!!!!!!!!!!!!!!!!!!!

=4090506-\(\dfrac{3}{2023}\)*2021+2020

=4090506-\(\dfrac{6063}{2023}\)+2020

=\(\dfrac{8279174035}{2023}\) tối giản luôn rồi nhé

NHỚ PHẢI TÍCH TỚ ĐẤY

S=1-1/2-1/3+....+1/29-1/30

=1-1/30

=29/30

S = 1/1x1/2+1/2x1/3+1/3x1/4+...+1/28x1/29+1/29+1/30

S = 1/1-1/2+1/2-1/3+1/3-1/4+...+1/28-1/29+1/29+1/30

Đến đây ta triệt tiêu,còn lại:

S = 1/1-1/30

S = 29/30

Mình chắc chắn lun!

\(25+27-48-25-37=\left(25-25\right)+\left(27-37\right)-48\)

\(=0-10-48\)

\(=-58\)

= 25-25+27-37-48

=0+(-10)-48

=-10-48

=-58

25+27-48-25-37

=(25-25)+(27-37)-48

=0+0-48

=-48

1 The meeting was canceled 3 days ago

2 She told me she was watching a film with her sister then

3 I admire the guitarist who is perfroming on the stage

4 Had it not been for Pauline's interest, the project would have been abandoned 

IV. 

1. The meeting was canceled 3 days ago.

2. She told me shewas watching a film with her sister then

3. I admire the guitarist who is performing on the stage

4. Had it not been for Pauline's interest, the project was abandoned. (chắc thế)