Question

11x29+53x23+29x89+23x47

Answer 1

\(=29.\left(11+89\right)+23.\left(53+47\right)=29.100+23.100=2900+2300=5200\)

Answer 2

= 29 . ( 11 + 89 ) + 23 . ( 53 + 47 )

= 29 . 100 + 23 . 100

= 2900 + 2300

= 5200

Answer 3

11x29+53x23+29x89+23x47

=29x(11+89)+23x(53+47)

=29x100+23x100

=2900+2300

=5200.

Answer 4

\(=\left(11\times29+29\times89\right)+\left(53\times23+23\times47\right)\) 

\(=\left[29\times\left(11+89\right)\right]+\left[23\times\left(53+47\right)\right]\) 

\(=29\times100+23\times100=100\times\left(29+23\right)\) 

\(=100\times52=5200\)

Answer 5

Mình cảm ơn ^^