9万八千七百六十六成语9万8768-98765乘以9万八千六百七十九

9万八千七百六十六成语9万8768-98765乘以9万八千六百七十九奥数题
2024-12-18 07:24:43
推荐回答(1个)
回答1:

98766×98768-98765×98679
=(98765+1)×(98769-1)-98765×(98769-90)
=98765×98769-98765+98769-1-98765×98769+98765×90
=98769-98765-1+98765×90
=4-1+8888850
=8888853