8.9成78加89成2.2简便计算

8.9成78加89成2.2简便计算
2025-06-28 02:07:16
推荐回答(3个)
回答1:

8.9×78+89×2.2
=89×7.8+89×2.2
=89×(7.8+2.2)
=89×10
=890

回答2:

8.9x78+89x2.2
=89x(7.8x2.2)
=89x10
=890

回答3:


请采纳