Question

甲數(shù)是196，正好是乙數(shù)的4倍，求比乙數(shù)多2.5的數(shù)．

Answer 1

分析：甲數(shù)是196，正好是乙數(shù)的4倍，根據(jù)除法的意義可知，乙數(shù)是196÷4，根據(jù)加法的意義可知，比乙數(shù)多2.5的數(shù)是196÷4+2.5．

解答：解：196÷4+2.5
=49+2.5，
=51.5．
答：比乙數(shù)多2.5的數(shù)是51.5．

點(diǎn)評：已知一個(gè)數(shù)的幾倍是多少，求這個(gè)數(shù)，用除法．