分析:本題根據(jù)小數(shù)乘法與除法的運(yùn)算法則列豎式計(jì)算即可.
解答:解:2.4×6.3=15.12;
3.06×1.2=3.672;
14.21÷7=2.03;
8.84÷1.7=5.2.
點(diǎn)評(píng):小數(shù)乘法法則:按整數(shù)乘法的法則算出積; 再看因數(shù)中一共有幾位小數(shù),就從得數(shù)的右邊起數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn). 得數(shù)的小數(shù)部分末尾有0,一般要把0去掉.
除數(shù)是整數(shù)的小數(shù)除法法則:按照整數(shù)除法的法則去除,商的小數(shù)點(diǎn)要和被除數(shù)的小數(shù)點(diǎn)對(duì)齊; 如果除到被除數(shù)的末尾仍有余數(shù),就在余數(shù)后面補(bǔ)零,再繼續(xù)除.
除數(shù)是小數(shù)的小數(shù)除法法則:先看除數(shù)中有幾位小數(shù),就把被除數(shù)的小數(shù)點(diǎn)向右移動(dòng)幾位,數(shù)位不夠的用零補(bǔ)足; 然后按照除數(shù)是整數(shù)的小數(shù)除法來除.