3.56×2.44的積有________位小數(shù);8.4÷0.07的商的最高位在________位上.
四 百
分析:根據(jù)小數(shù)乘法的計算法則,先按照整數(shù)乘法的計算法則算出積,再看兩個因數(shù)一共有幾位小數(shù),就從積的右邊起數(shù)出幾位點上小數(shù)點.
根據(jù)小數(shù)除法的計算法則,先移動除數(shù)的小數(shù)點,使它變成整數(shù),除數(shù)的小數(shù)點向右移動幾位,被除數(shù)的小數(shù)點也向右移動幾位,然后按照除數(shù)是整數(shù)的小數(shù)除法計算.據(jù)此解答.
解答:3.56×2.44=8.6864,積是四位小數(shù).
8.4÷0.07=120,商的最高位在百位上.
故答案為:四,百.
點評:此題考查的目的是理解掌握小數(shù)乘、除法的計算法則.