Question

5．甲隊(duì)的人數(shù)比乙隊(duì)的人數(shù)多$\frac{1}{5}$，乙隊(duì)的人數(shù)就比甲隊(duì)的人數(shù)少$\frac{1}{6}$．√．（判斷對(duì)錯(cuò)）

Answer 1

分析 甲隊(duì)人數(shù)比乙隊(duì)人數(shù)多$\frac{1}{5}$，把乙隊(duì)人數(shù)看作單位“1”，則甲隊(duì)人數(shù)為1+$\frac{1}{5}$=$\frac{6}{5}$，要求乙隊(duì)人數(shù)就比甲隊(duì)人數(shù)少幾分之幾，就是用乙隊(duì)人數(shù)比甲隊(duì)人數(shù)少的部分除以甲隊(duì)的人數(shù)，即$\frac{1}{5}$÷$\frac{6}{5}$=$\frac{1}{6}$，判斷即可．

解答 解：$\frac{1}{5}$÷（1+$\frac{1}{5}$）
=$\frac{1}{5}$÷$\frac{6}{5}$
=$\frac{1}{6}$
答：乙隊(duì)人數(shù)就比甲隊(duì)人數(shù)少$\frac{1}{6}$．
故答案為：√．

點(diǎn)評(píng) 解答此題的關(guān)鍵：判斷出單位“1”，求一個(gè)數(shù)比另一個(gè)數(shù)多（或少）百分之幾，根據(jù)“（大數(shù)-小數(shù)）÷單位“1”的量”進(jìn)行解答即可．