如题所述
第1个回答 2022-05-09
301×798
=(300+1)×798
=798×300+798
=300×(800-2)+800-2
=240000-600+800-2
=240202
=(300+1)×798
=798×300+798
=300×(800-2)+800-2
=240000-600+800-2
=240202
第2个回答 2022-05-09
301*798
=301*(800-2)
=301*800-301*2
=240800-602
=240198
=301*(800-2)
=301*800-301*2
=240800-602
=240198
第3个回答 2022-05-09
301×798
=301×(800-2)
=301×800-301×2
=240800-602
=240198
=301×(800-2)
=301×800-301×2
=240800-602
=240198