Bài làm :
Ta có :
37x54+46x37+53x79+53x21
=37x(54+46)+53x(79+21)
=37x100+53x100
=100x(37+53)
=100x90
=9000
37×54+46×37+53×79+53×21
=37×(54+46)+53×(79+21)
=37×100+53×100
=100×(37+53)
=100×90
=9000
37 . 54 + 46 . 37 + 53 . 79 + 53 . 21
= 37 . ( 54 + 46 ) + 53 . ( 79 + 21 )
= 37 . 100 + 53 . 100
= 100 . ( 37 + 53 )
= 100 . 90
= 9000