Question

甲、乙兩數(shù)的差是378，甲數(shù)的小數(shù)點(diǎn)向左移動(dòng)一位就與乙數(shù)相等，甲、乙兩數(shù)各是多少？

Answer 1

分析：甲數(shù)的小數(shù)點(diǎn)向左移動(dòng)一位就與乙數(shù)相等，說(shuō)明甲數(shù)是乙數(shù)的10倍，則甲數(shù)比乙數(shù)多10-1=9倍，據(jù)此根據(jù)差倍公式即可求出乙數(shù)是378÷9=42，則甲數(shù)就是378+42=420．

解答：解：根據(jù)題干分析可得：378÷（10-1），
=378÷9，
=42，
則甲數(shù)是378+42=420．
答：甲數(shù)是420，乙數(shù)是42．

點(diǎn)評(píng)：此題主要考查差倍公式的計(jì)算應(yīng)用，得出甲數(shù)是乙數(shù)的10倍，是解答此題的關(guān)鍵．