\(=29.\left(11+89\right)+23.\left(53+47\right)=29.100+23.100=2900+2300=5200\)
= 29 . ( 11 + 89 ) + 23 . ( 53 + 47 )
= 29 . 100 + 23 . 100
= 2900 + 2300
= 5200
11x29+53x23+29x89+23x47
=29x(11+89)+23x(53+47)
=29x100+23x100
=2900+2300
=5200.
\(=\left(11\times29+29\times89\right)+\left(53\times23+23\times47\right)\)
\(=\left[29\times\left(11+89\right)\right]+\left[23\times\left(53+47\right)\right]\)
\(=29\times100+23\times100=100\times\left(29+23\right)\)
\(=100\times52=5200\)
