為什麼要先乘除後加減?
why need first multiply next divide ?
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為什麼要先乘除後加減?
2007-01-18 9:50 pm
回答 (5)
2007-01-24 1:31 am
VERY GOOD ANS.
2007-01-18 10:09 pm
因為你唔先乘除後加減就錯啦
2007-01-18 9:56 pm
No particular reason for 乘除後加減, it's simply the general practice.
"why need first multiply next divide ?"
you don't need to multiply first. same results.
"why need first multiply next divide ?"
you don't need to multiply first. same results.
2007-01-18 9:56 pm
e.g.
2 x 2 - 2 = 2
即係 2 + 2 - 2 = 2
但如果先減, 就會變成 2 x 0 = 0
邏輯上不成立了
2 x 2 - 2 = 2
即係 2 + 2 - 2 = 2
但如果先減, 就會變成 2 x 0 = 0
邏輯上不成立了
2007-01-18 9:55 pm
因為除排最大而乘排第二......................所以要乘再加減？.......
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