520×46+48×460

=52×10×46+48×460

=52×（10×46）+48×460

=52×460+48×460

=（52+48）×460

=100×460

=46000

520×46+48×460

=520×46+48×10×46

=520×46+480×46

=（520+480）×46

=1000×46

=46000