標題:
急~中一數學一問(詳細回答)
The monthly salary of an engineer is $9500. This is increased by 8% after a year. By how much is his monthly salary increased in the second year?-------The price of a TV set decrease from $8800 to $7744. What is the percentage decrease?-------A machine is bought for $450000 and a profit of $9000 is made. Find... 顯示更多 The monthly salary of an engineer is $9500. This is increased by 8% after a year. By how much is his monthly salary increased in the second year? ------- The price of a TV set decrease from $8800 to $7744. What is the percentage decrease? ------- A machine is bought for $450000 and a profit of $9000 is made. Find the percentage profit. ------- The profit on selling an article is 44% of its cost price. If the profit is $1056, find the selling price of the article. ------ 1.5cm : 4.5km
最佳解答:
1) 因為佢只係問第二年佢既薪水上升左幾多錢，所以我地張9500成番8%就搵到佢加大幾多錢(=上升左幾多錢) 9500x8% =9500x0.08 =760 2) (新值 - 原值)/原值 x100% 搵到百分數既增減 (7744-8800)/8800 x 100% = -1056/8800x100% = -12% (計數機個答案可能係點數-0.12 ，姐係= -12%) 3)衣條又係用番第二條嗰條式 9000就係machine既profit 姐係新值減左原值既既數目，所以就可以即刻用黎計 450000-9000=441000 (因為9000係profit，所以張新值-佢賺左幾多(9000)就可以搵到原值 9000/441000x100% = 2% (大約值) 4) 設cost price of the article be y y*成44% = 1056 (因為題目話profit 係ｃｏｓｔ既４４％） 0.44y = 1056 y = 2400 cost price 係2400 selling price = 2400+1056 ( 成本再加佢既profit 就會= 佢既selling price) = 3456 5) 1.5cm : 4.5km 1.5cm : 4.5(100)(1000) 張佢化番做cm (做衣d數既時候，單位要一樣先可以計到) 1.5cm : 4500000cm 兩邊除1.5 就會變做1:幾 1 : 3000000 ( 衣條唔係好肯定你想問乜，我估你係想問點轉番做一比幾) 希望幫到你啦!!
其他解答:
急~中一數學一問(詳細回答)
此文章來自奇摩知識+如有不便請留言告知
發問:The monthly salary of an engineer is $9500. This is increased by 8% after a year. By how much is his monthly salary increased in the second year?-------The price of a TV set decrease from $8800 to $7744. What is the percentage decrease?-------A machine is bought for $450000 and a profit of $9000 is made. Find... 顯示更多 The monthly salary of an engineer is $9500. This is increased by 8% after a year. By how much is his monthly salary increased in the second year? ------- The price of a TV set decrease from $8800 to $7744. What is the percentage decrease? ------- A machine is bought for $450000 and a profit of $9000 is made. Find the percentage profit. ------- The profit on selling an article is 44% of its cost price. If the profit is $1056, find the selling price of the article. ------ 1.5cm : 4.5km
最佳解答:
1) 因為佢只係問第二年佢既薪水上升左幾多錢，所以我地張9500成番8%就搵到佢加大幾多錢(=上升左幾多錢) 9500x8% =9500x0.08 =760 2) (新值 - 原值)/原值 x100% 搵到百分數既增減 (7744-8800)/8800 x 100% = -1056/8800x100% = -12% (計數機個答案可能係點數-0.12 ，姐係= -12%) 3)衣條又係用番第二條嗰條式 9000就係machine既profit 姐係新值減左原值既既數目，所以就可以即刻用黎計 450000-9000=441000 (因為9000係profit，所以張新值-佢賺左幾多(9000)就可以搵到原值 9000/441000x100% = 2% (大約值) 4) 設cost price of the article be y y*成44% = 1056 (因為題目話profit 係ｃｏｓｔ既４４％） 0.44y = 1056 y = 2400 cost price 係2400 selling price = 2400+1056 ( 成本再加佢既profit 就會= 佢既selling price) = 3456 5) 1.5cm : 4.5km 1.5cm : 4.5(100)(1000) 張佢化番做cm (做衣d數既時候，單位要一樣先可以計到) 1.5cm : 4500000cm 兩邊除1.5 就會變做1:幾 1 : 3000000 ( 衣條唔係好肯定你想問乜，我估你係想問點轉番做一比幾) 希望幫到你啦!!
其他解答:
文章標籤
全站熱搜
留言列表
