对于两个数a与b,规定a□b=a+(a+1)+(a+2)+…+(a+b﹣1).已知X□6=27,X= .
8÷ ==2: =0.4= %= 成.
8: === ÷100= %= (填小数)
==( ):40=( )%=40: .
n÷n=. .
= ÷8=1.25=5: = %