Question

甲、乙兩數(shù)的和是4.75，若甲的小數(shù)點(diǎn)向左移動(dòng)一位就等于乙數(shù)的

3

8

，則甲數(shù)是

3.75

．

Answer 1

分析：甲的小數(shù)點(diǎn)向左移動(dòng)一位，就縮小到原數(shù)的

1

10

，甲數(shù)就是乙數(shù)的（

3

8

÷

1

10

）倍，據(jù)此解答．

解答：解：

3

8

÷

1

10

=3.75，
4.75÷（3.75+1），
=4.75÷4.75，
=1，
4.75-1=3.75．
答：甲數(shù)是3.75．

點(diǎn)評(píng)：本題的關(guān)鍵是求出甲數(shù)是乙數(shù)的多少倍，再進(jìn)行解答．