几道数学题,要递等式(拖式计算)写出来(111+999)/〖56*(3/7-3/8)〗200.5%+2.005*490+0.2005*50003333*3333+9999*88891/1*4+1/4*7+1/7*10+……+1/97*100

问题描述:

几道数学题,要递等式(拖式计算)写出来
(111+999)/〖56*(3/7-3/8)〗
200.5%+2.005*490+0.2005*5000
3333*3333+9999*8889
1/1*4+1/4*7+1/7*10+……+1/97*100

(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×(1+490+500)
=2.005×991
=1986.955
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

(111+999)/〖56*(3/7-3/8)〗
=111(1+9)/〔24-21〕
=1110 /3
=(1200-90)/3
=400-30
=370
200.5%+2.005*490+0.2005*5000
=2.005+2.005×490+2.005×500
=2.005×(1+490+500)
=2.005×991
=(2+0.005)+(1000-9)
=2000-18+5-0.045
=1986.955
3333*3333+9999*8889
=3333*3*1111+9999*8889
=9999*(1111+8889)
=9999×10000
=99990000
1/1*4+1/4*7+1/7*10+……+1/97*100
=1*(1/4)+(1/4)*(1/7)+(1/7)*(1/10)+...(1/97)*(1/100)
...不学数学5年多,公式都忘了,做不下去了,不好意思啊

(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 =20053333*3333+9999*8889 =333...