12.5×8÷12.5×8能簡算的要簡算! 能簡算一定要簡算啊!

12.5×8÷12.5×8能簡算的要簡算! 能簡算一定要簡算啊!


12.5÷12.5×8×8=1×8×8=64



2.5*(8-0.4)*12.5簡算


2.5*(8-0.4)*12.5
=2.5*12.5*(8-0.4)
=2.5*12.5*8-2.5*12.5*0.4
=2.5*(12.5*8)-(2.5*0.4)*12.5
=2.5*100-1*12.5
=250-12.5
=237.5



8.7*6+0.4*87怎麼簡算?


8.7*6+0.4*87
=8.7*(6+0.4*10)
=8.7*(6+4)
=8.7*10
=87



7/8×4÷7/8×4簡算