Question

生日宴會(huì)做飲料，一聽(tīng)濃縮果汁需要加3聽(tīng)水，就可以做一瓶果汁．

濃縮果汁的聽(tīng)數(shù)	水的聽(tīng)數(shù)	果汁的瓶數(shù)
1	3	1
2	6	2
…	…	…

如果用6聽(tīng)濃縮物，需要加多少聽(tīng)水能做多少瓶果汁？

1. A.
   加6聽(tīng)水能做出18瓶果汁
2. B.
   加7聽(tīng)水能做出21瓶果汁
3. C.
   加18聽(tīng)水能做出6瓶果汁
4. D.
   加21聽(tīng)水能做出7瓶果汁

Answer 1

C
分析：根據(jù)圖表知道1聽(tīng)濃縮果汁需要加3聽(tīng)水，就可以做1瓶果汁；2聽(tīng)濃縮果汁需要加6聽(tīng)水，就可以做2瓶果汁．即所需水的聽(tīng)數(shù)是濃縮果汁的聽(tīng)數(shù)3÷1=3倍，濃縮物的聽(tīng)數(shù)等于所做的果汁的瓶數(shù)；由此求出用6聽(tīng)濃縮物，需要加水的聽(tīng)數(shù)及能做果汁的瓶數(shù)．
解答：6×（3÷1），
=6×3，
=18（聽(tīng)），
能做6瓶果汁；
答：如果用6聽(tīng)濃縮物，需要加18聽(tīng)水能做6瓶果汁；
故選：C．
點(diǎn)評(píng)：關(guān)鍵是根據(jù)圖表得出所需水的聽(tīng)數(shù)是濃縮果汁的聽(tīng)數(shù)的3倍，濃縮物的聽(tīng)數(shù)等于所做的果汁的瓶數(shù)；由此得出答案．