16×25×15簡算

16×25×15簡算


16×25×15
=4×4×25×15
=(4×25)×(4×15)
=100×60
=6000



27分之4*19分之5加27分之5*19分之15(簡算)


27分之4*19分之5加27分之5*19分之15
=4/27X5/19+5/27X15/19
=5/27X4/19+5/27X15/19
=5/27X(4/19+15/19)
=5/27X19/19
=5/27



簡便計算300/25/4


=300/(25×4)
=300/100
=3



4×12×25怎樣簡便計算


4×12×25
=4*25*12
=100*12
=1200