72×9+28×9+19简便计算

2024-12-05 16:07:49
推荐回答(3个)
回答1:

=(72+28)*9+19=100*9+19=900+19=919

回答2:

72X9+28+9+19=9(72+28)+19=9X100+19=900+19=919

回答3:

{72+28}x9+19
=100x9+19
=90+19
=109