(111+999)/〖56*(3/7-3/8)〗
=111(1+9)/〔24-21〕
=1110 /3
=370
200.5%+2.005*490+0.2005*5000
=2.005+2.005×490+2.005×500
=2.005×(10+490+500)
=2.005×1000
=2005
3333*3333+9999*8889
=3333×(3333+3×8889)
=9999×(1111+8889)
=9999×10000
=99990000
1/1*4+1/4*7+1/7*10+……+1/97*100
=(1-3/4)+(3/4-5/7)+(5/7-7/10)+……+(65/97-67/100)
=1-67/100
=33/100