下面三個算式中,哪些算式正確?

111年五年級數學學測

Quiz
•
Mathematics
•
5th Grade
•
Hard
韻全 新竹縣信勢國小
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30 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
將一張圓形色紙,剪成下圖中的扇形A和扇形B。AB 下面是甲、乙二人關於扇形A和扇形B的說法。甲:扇形A和扇形B的圓心角相差180度。乙:扇形A是 3 4 圓 請問哪些人的說法正確?
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
18÷6×7
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
下圖是由兩個底邊相同、高不相同的三角形組合成的圖形。已知底邊為78公分,高分別是39公分和65公分。下列哪個算式可以算出這兩個三角形的面積和是多少平方公分?39 +65×78÷21 78×39 +78×65÷2 78×(39 +65) (39 +65)×78÷2
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
如圖,已知BD、DE和EC的長度相等,且三角形ABC的面積為45平方公分,請問三角形ADC的面積為多少平方公分?
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
如圖,△ABC是直角三角形,AD是BC上的高,請問AD長多少公分?
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
「888.888」中,十分位數字「8」所代表的值是十位數字「8」所代表的值的多少倍?
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