25.2÷[14.2(-7.2+2.8)] 15.52+7.8×5-4.92 3.6×(2.4÷0.06×1.8) [32+(16-0.48)]×2.7 脱式计算
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15.52+7.8×5-4.92
=15.52+7又4/5×5-4.92
=15.52-4.92+28
=11+28
=39
3.6×(2.4÷0.06×1.8)
=3.6×【14/5×(50/3)×(9/5)】
=18/5×12/5×50/3×9/5
=1296/5
[32+(16-0.48)]×2.7
=48*27/10-(12/25*27/10)
=648/5-(162/125)
=16200/125-(162/25)
=16038/125
=15.52+7又4/5×5-4.92
=15.52-4.92+28
=11+28
=39
3.6×(2.4÷0.06×1.8)
=3.6×【14/5×(50/3)×(9/5)】
=18/5×12/5×50/3×9/5
=1296/5
[32+(16-0.48)]×2.7
=48*27/10-(12/25*27/10)
=648/5-(162/125)
=16200/125-(162/25)
=16038/125
更多追问追答
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( / )这个符号是啥啊
追答
除号。。。。第一题有的题目看不到。。。
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