[3/4+2/3×21/8]÷0.25
[3/4+2/3×21/8]÷0.25
2/5÷(-2 2/5)-8/21×(-1 3/4)-0.25 最好有什么简便计算提示(运算律)
计算(-2)^4÷(-8\3)^2+(11\2)×(-1\6)-0.25
0.25÷8/5+3/2+5/3简便计算
3.75-[(-8又3/7)+(-7.5)+(-21又4/7)+(3又1/2)]+0.25=?
(-48)÷8-(-25)×(-6) 42×(-3分之2)+(-4分之3)÷(-0.25)
2:8=0.25=3÷( )=( )分之4=5:( )
(2÷3÷7+4÷6÷14+14÷21÷49)÷(4÷7÷9+8÷14÷18+28÷49÷63)=?
(2÷3÷7+4÷6÷14+14÷21÷49)÷(4÷7÷9+8÷14÷18+28÷49÷63)
(-3分之2)×(-5分之8)÷(-0.25)
2÷3÷7+4÷6÷14+14÷21÷494÷7÷9+8÷14÷18+28÷49÷63
计数:(-2/5)²÷(-12/5)-8/21×(-7/4)-0.25