數學(小數四則)(要直式)

2008-09-30 1:33 am
1.0.54x65÷(054-0.15) 直式





20×2÷(19.5+7.5)



回答 (2)

2008-10-04 1:57 am
✔ 最佳答案
1). 0.54x65÷(054-0.15)
=35.1÷(0.54-0.15)
=35.1÷0.39
=90

2.)20×2÷(19.5+7.5)
=40÷27
. . .
=1.481 (循環小數)

2008-10-03 17:58:03 補充:
第2題應該係咁:

2.)20×2÷(19.5+7.5)
=40÷27
. . .
=1.481 (循環小數)

2008-10-03 17:59:00 補充:
d小數點係481上面.
唔知點解整唔到.
SOR!!!
參考: 自已計
2008-09-30 1:49 am
1.0.54x65÷(0.54-0.15) 直式
=35.1÷0.39
=90



20×2÷(19.5+7.5)
=40÷27
=1.48


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