Question

幫小動(dòng)物找家．（連一連）

Answer 1

分析：根據(jù)小數(shù)乘法的計(jì)算方法知：積中小數(shù)的位數(shù)等于因數(shù)中各個(gè)因數(shù)小數(shù)位數(shù)的和．5.2×1.45的積的小數(shù)位數(shù)是2位，因這兩個(gè)因數(shù)最末尾的數(shù)字的乘積的末尾數(shù)是0，要求出它們的積，再確定積是幾位小數(shù)．據(jù)此解答．

解答：解：5.2×1.45=7.54積是兩位數(shù)．

點(diǎn)評(píng)：本題主要考查了學(xué)生根據(jù)小數(shù)乘法的計(jì)算方法來解答問題的能力．注意5.2×1.45的積的小數(shù)位數(shù)是2位．