Question

Tính nhanh:

213x37+213x37+23x213+213

2007x16-2007x14-2007x2+2007

Answer 1

   213 x 37 + 213 x 37 + 23 x 213 + 213 

=  213 x 37 + 213 x 37 + 23 x 213 + 213 x 1

= 213 x ( 37 + 37 + 23 + 1 )

= 213 x  98

= 20874

   2007 x 16 - 2007 x 14 - 2007 x 2 + 2007

= 2007 x 16 - 2007 x 14 - 2007 x 2 + 2007 x 1

= 2007 x ( 16 - 14 - 2 - 1 )

= 2007 x 9

= 18063

Chúc bạn học tốt~

Answer 2

213*(37+37+23+1)=213*98=21874

Answer 3

2007*(16-14-2+1)=2007*1=2007

Answer 4

k mk ik

Answer 5

ai k mk ik mk ít điểm lém

Answer 6

giúp tí đê

Answer 7

\(213\cdot37+213\cdot37+23\cdot213+213\)

\(=213\cdot\left(37+37+23\right)+213\)

\(=213\cdot100+213\)

\(=21300+213\)

\(=21523\)

Answer 8

 213 x 37 + 213 x 37+ 23 x 213 + 213  = 213 x 37 + 213 x 37 + 23 x 213 + 213 x 1

= 213 x ( 37 + 37 + 23 + 1 ) = 213 x 98

= 20874

2007 x 16 - 2007 x 14 - 2007 x 2 + 2007 = 2007 x 16 - 2007 x 14 - 2007 x 2 + 2007 x 1

= 2007 x ( 16 - 14 + 1 ) = 2007 x 3 = 6021 

Answer 9

\(2007\cdot16-2007\cdot14-2007\cdot2+2007\)

\(=2007\cdot\left(16-14-2\right)+2007\)

\(=2007\cdot0+2007\)

\(=2007\)

Answer 10

Mik xin lỗi mik ghi nhầm 

phép tính thứ 2 là 

2007 x ( 16 - 14 - 2 + 1 )

= 2007 x 10 = 20070 nha

Answer 11

   213 x 37 + 213 x 37 + 23 x 213 + 213 

=  213 x 37 + 213 x 37 + 23 x 213 + 213 x 1

= 213 x ( 37 + 37 + 23 + 1 )

= 213 x  98 = 20874    2007 x 16 - 2007 x 14 - 2007 x 2 + 2007

= 2007 x 16 - 2007 x 14 - 2007 x 2 + 2007 x 1

= 2007 x ( 16 - 14 - 2 - 1 ) = 2007 x 9

= 18063