2016(34+63+2+1)=2016*100=201600

2016 x 72 + 2016 x 29 – 2016

=(2016-2016) x (72 + 29) 

=  0  x  101=0

\(2016\times72+2016\times29-2016=2016\times72+2016\times29-2016\times1=2016\times\left(72+29-1\right)=2016\times10=201600\)

\(789\times78+788\times22\)

\(=(788+1)\times78+788\times22\)

\(=1\times78+788\times78+788\times78\)

\(=78+788\times(78+22)\)

\(=78+788\times100\)

\(=78+78800\)

\(=78878\)

\(108\times5+108\times96-108=108\times\left(5+96-1\right)\)

                                                              \(=108\times100=10800\)

`108xx5+108xx96-108`

`=108xx(5+96-1)`

`=108xx100`

`=10800`

2016 x 2016 - 2016 x 2016

= 2016 x (2016 - 2016)

= 2016 x 0

= 0

Bài 2 . Cô giáo phát cho số em là :

  21 : 3 = 7 ( em )

Đáp số : 7 em

bằng 0

dễ ẹt mà cũng hỏi

nhớ k cho minh nha !

A = \(\frac{2012+2014\times2013}{2014\times2015-2016}\)

A = \(\frac{2012+2014\times2013}{2014\times\left(2013+2\right)-2016}\)

A = \(\frac{2012+2014\times2013}{2014\times2013+4028-2016}\)

A = \(\frac{2014\times2013+2012}{2014\times2013+\left(4028-2016\right)}\)

A = \(\frac{2014\times2013+2012}{2014\times2013+2012}\)

A = 1

(25*36):9=900:9=100

8x427x3+6x573x4

=24x427+24x573

= 24x( 427+573)

=24x 1000

=24000

84x141-84x41

= 84x(141-41) 

= 84x100

= 8400