考點(diǎn):小數(shù)乘法
專(zhuān)題:運(yùn)算順序及法則
分析:(1)根據(jù)小數(shù)乘法的計(jì)算法則可知,積的小數(shù)位數(shù)等于兩個(gè)因數(shù)小數(shù)位數(shù)的和,0.98是兩位小數(shù),0.46是兩位小數(shù),2+2=4,所以0.98×0.46的積是四位小數(shù).
(2)將0.365擴(kuò)大到100倍,即小數(shù)點(diǎn)向右移動(dòng)兩位,為36.5;進(jìn)行解答即可.
解答:
解:(1)0.98是兩位小數(shù),0.46是兩位小數(shù),2+2=4,所以0.98×0.46的積是四位小數(shù);
(2)將0.365擴(kuò)大到100倍,即小數(shù)點(diǎn)向右移動(dòng)兩位,為36.5.
故答案為:四位小數(shù),36.5.
點(diǎn)評(píng):此題考查的目的是掌握判斷小數(shù)乘法中積的小數(shù)位數(shù)的方法,以及本題主要考查小數(shù)點(diǎn)位置移動(dòng)引起小數(shù)大小變化的規(guī)律.