七年級上冊數(shù)學(xué)訓(xùn)練題之正數(shù)和負數(shù)
1.如果+5oC表示比零度高+5oC,那么比零度低7oC記作_______oC.
2.如果-60元表示支出60元,那么+100元表示______________.
3.下列各數(shù)-0.05-+120-4.10-8
正數(shù)有__________________;負數(shù)有_____________;整數(shù)有_________________分數(shù)有__________________.
4.的相反數(shù)是______;________.和0.5互為相反數(shù);_________的相反數(shù)是它本身.
5.-(+6)是_______的.相反數(shù),-(-7)是_______的相反數(shù).[
6.按規(guī)律填數(shù)1,-2,3,-4,5,____,_____,...
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