Question

若甲數(shù)比乙數(shù)多

1

8

，則乙數(shù)比甲數(shù)少

1

8

．

×

．（判斷對(duì)錯(cuò)）

Answer 1

分析：根據(jù)題意知：甲比乙數(shù)多

1

8

，則把乙數(shù)看作單位“1”，甲數(shù)是乙數(shù)的1+

1

8

=

9

8

，求乙數(shù)比甲數(shù)少幾分之幾，就要用乙數(shù)比甲數(shù)少的除以甲數(shù)．據(jù)此解答．

解答：解：（1+

1

8

-1）÷

9

8

=

1

8

÷

9

8

=

1

9

答：乙數(shù)比甲數(shù)少

1

9

．
故答案為：×．

點(diǎn)評(píng)：本題的關(guān)鍵是讓學(xué)生理解，兩次比較的單位“1”不同．