Question

兩個數(shù)的差是380.7，乙數(shù)是一位小數(shù)，乙數(shù)去掉小數(shù)點和甲數(shù)同樣大，甲、乙兩數(shù)各是多少？

Answer 1

分析：由題意，乙數(shù)是一位小數(shù)，乙數(shù)去掉小數(shù)點和甲數(shù)同樣大，可知甲數(shù)是乙數(shù)的10倍，則甲數(shù)比乙數(shù)多9倍，多380.7，由此可求得乙數(shù)，進而求得甲數(shù)；據(jù)此解答．

解答：解：380.7÷（10-1）=42.3，
42.3×10=423；
答：甲數(shù)是423，乙數(shù)是42.3．

點評：解答此題關(guān)鍵是明確甲數(shù)比乙數(shù)多9倍，多380.7．