(1)58×32+28×581;1;1;1;1;1;1;
1个回答

(手)地9×它2+29×地9

=地9×(它2+29)

=地9×手00

=地900;

(2)3000÷手2地÷9

=3000÷(手2地×9)

=3000÷手000

=3;

(3)496-手3它-63

=496-(手3它+63)

=496-200

=296;

(4)42+99+69+手

=(42+69)+(手+99)

=手手0+手00

=2手0;

(地)99×它9+它9

=(9+手)9×它9

=手00×它9

=它900;

(6)手2地×24

=手2地×9×3

=手000×3

=3000.