378+19-24+81用简便方法计算

378+19-24+81用简便方法计算
2025-04-05 17:40:10
推荐回答(3个)
回答1:

378+19—24+81

378+19-24+81
=378+(19+81)-24
=378+100-24
=478-24
=454

回答2:

378+19-24+81
=(378-24)+(19+81)
=354+100
=454

回答3:

378+19-24+81
=378+(19+81)-24
=378+100-24
=478-24
=454