12345679乘以(99乘以2+1)=?
=3乘以2乘以1,=4乘以3乘以2乘以1,=5乘以4乘以3乘以2乘以1,那么100!除以99!
1乘以2乘以3乘以4.乘以99的积的末尾有几个零?
27046=2乘以( )+7乘以( )+4乘以( )+6乘以( )
1乘以2+2乘以3+3乘以4+4乘以5……+97乘以98+98乘以99+99乘以100等于多少
A=B乘以57 A乘以2等于B乘以( )A乘以5等于B乘以( )A乘以()等于B乘以12 A乘以()等于B乘以29
1乘以2乘以3分之1+2乘以3乘以4分之1+……+98乘以99乘以100分之1
56分之53乘以57 2分之1乘以3分之2乘以4分之3乘以.乘以100分之99乘以101分之100
观察1乘以2乘以3乘以4+1=25=5² 2乘以3乘以4乘以5+1=121=11²
99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以.(1-99分之1)等于?
100分之91乘以99= 16分之13 乘以(1-13分之6)= 5分之4乘以3分之8-0.8乘以
3分之1乘以()=()乘以5分之2=8乘以()=()乘以0.3=1
1乘以2乘以3乘以4乘以5乘以.100积有几个零