9/11+5/7-20/11+8/13+2/7

2 câu trả lời

Answer

911+572011+813+27=(9112011)+(57+27)+813=1111+77+813=1+1+813=0+813=813

911+57-2011+813+27

=(911-2011)+(57+27)+813

=-1111+77+813

=-1+1+813

=0+813

=813