空括号458减括号85+28括号中括号除以23的简便计算

2025-12-16 19:53:31
推荐回答(2个)
回答1:

105×12-635)÷25
=(1260-635)÷25
=625÷25
=25

回答2:

①(105×12-635)÷25  
=(1260-635)÷25
=625÷25
=25    

②[458-(85+28)]÷23
=[458-113]÷23
=345÷23
=15

③630×[840÷(240-212)]
=630×[840÷28]
=630×30
=18900

④288÷[(26-14)×8]
=288÷[12×8]
=288÷96
=3