2.6×0.4的積有________位小數(shù);35÷0.28的商的最高是________位.
兩 百
分析:(1)兩個小數(shù)相乘,積的小數(shù)位數(shù)等于兩個因數(shù)的小數(shù)位數(shù)和,注意末尾數(shù)相乘是整十數(shù)的;
(2)除數(shù)0.28是小數(shù)的,根據(jù)商不變的規(guī)律,把除數(shù)0.28擴大100倍是28,那么被除數(shù)35也擴大100倍是3500,然后再進一步解答即可.
解答:根據(jù)題意可得:
(1)2.6是一位小數(shù),0.4是一位小數(shù),末尾數(shù)6×4=24,不是整十數(shù);所以,它們的積的小數(shù)位數(shù)是:1+1=2,即積是兩位小數(shù);
(2)除數(shù)0.28是小數(shù),根據(jù)商不變的規(guī)律,把除數(shù)0.28擴大100倍是28,那么被除數(shù)35也擴大100倍是3500,3500÷28=125,商的最高位是百位,那么35÷0.28的商的最高也是百位.
故答案為:兩,百.
點評:本題主要考查小數(shù)的乘除法,然后再根據(jù)小數(shù)乘除法的知識進一步解答即可.