Words Problem 應用題 (advanced)

Originally Dixon has k pencils. Then he used 8 pencils. After buying half a dozen pencils, he had 10 pencils left. Which equation below can be used to find the original number of pencils Dixon had? 弟弟原有鉛筆 k 枝，用去了 8 枝，後來再買了半打鉛筆，現在還有鉛筆 10 枝。下列哪一個方程可找出弟弟原有鉛筆的數量？

• k + 8 + 6 = 10

• k + 8 – 6 = 10

• k – 8 + 6 = 10

• k – 8 – 6 = 10

A teddy bear costs $123. The cost of a doll is more expensive than the teddy bear. The difference in cost of the teddy bear and the doll is $39. Which equation below can be used to find the cost of the doll. 玩具熊每隻售 123 元，洋娃娃的售價比玩具熊的貴，玩具熊與洋娃娃的售價 相差 39 元。下列哪一個方程可找出洋娃娃的售價是多少元？

• B + 123 = 39

• B – 123 = 39

• 123B = 39

• B x 123 = 39

Initially, Sarah has m candies. She gave away 5 candies. After receiving 3 more candies, she has 12 candies left. Which equation below can be used to find the original number of candies Sarah had? 薇薇原有 m 顆糖果，送出了 5 顆，後來又收到了 3 顆，現在還剩下 12 顆。下列哪一個方程可找出薇薇原有糖果的數量？

• m – 5 + 3 = 12

• m + 5 – 3 = 12

• m – 5 – 3 = 12

• m + 5 + 3 = 12

A small box can hold 150 books which holds 30 books fewer than a large box. The bookshop owner fills up some large boxes with 900 books. A staff takes away 2 large boxes. How many large boxes of books are left in the bookshop now? 小箱子可裝圖書 150 本，比大箱子少裝圖書 30 本。書店店主用 幾個大箱子剛好裝了圖書 900 本。一位職員拿走了 2 箱，書店現 餘下圖書多少箱？

• (150 - 30) x 900 – 2

• 900 ÷ (150 - 30) – 2

• 900 ÷ (150 + 30) – 2

• 900 ÷ (150 - 30 - 2)

Half a dozen cakes cost $108. Each egg tart costs $6. Donald pays $500 to buy 1 cake and 1 egg tart. What is the change? 西餅半打售 108 元，蛋撻每件售 6 元。付 500 元買西餅和蛋撻各 1 件，應找回多少元？

• 500 – (108 ÷ 6 + 6)

• (108 ÷ 6 + 6) - 500

• 500 – (108 ÷ 6 x 6)

• 500 – 108 ÷ 6 + 6