Question

算一算．輕松過(guò)關(guān)（帶△的得數(shù)保留兩位小數(shù)） 21.42÷0.17=

△8.452÷1.8≈

99.68÷28=

Answer 1

分析：運(yùn)用小數(shù)的除法的計(jì)算法則進(jìn)行計(jì)算，運(yùn)用四舍五入的方法保留結(jié)果．

解答：解：①21.42÷0.17=126


②8.452÷1.8≈4.68


③99.68÷28=3.56

點(diǎn)評(píng)：本題考查了小數(shù)的小數(shù)的除法的計(jì)算法則，注意小數(shù)點(diǎn)與被除數(shù)的小數(shù)點(diǎn)對(duì)齊．