填一填.
(1)0.6里面有______個(gè)十分之一,有______個(gè)百分之一.
(2)______×6=26.4 7×______=7.35 8×______=2.88______×4=4.32
(3)除數(shù)是整數(shù)的小數(shù)除法,與整數(shù)除法的計(jì)算方法相同,商的小數(shù)點(diǎn)要和______的小數(shù)點(diǎn)對(duì)齊.
(4)37.28÷28的商比1______.
(5)216÷72=3,21.6÷72=______,0.216÷72=______.
解:(1)0.6里面有6個(gè)十分之一,有60個(gè)百分之一;
(2)26.4÷6=4.4,所以4.4×6=26.4,
7.35÷7=1.05,所以7×1.05=7.35,
2.88÷8=0.36,所以8×0.36=2.88,
4.32÷4=1.08,所以1.08×4=4.32;
(3)除數(shù)是整數(shù)的小數(shù)除法,與整數(shù)除法的計(jì)算方法相同,商的小數(shù)點(diǎn)要和被除數(shù)的小數(shù)點(diǎn)對(duì)齊;
(4)因被除數(shù)37.28的前兩位比除數(shù)28大,37.28÷28的商比1大;
(5)216÷72=3,
21.6÷72=0.3,
0.216÷72=0.003,
故答案為:(1)6,60;(2)4.4,1.05,0.36,1.08;(3)被除數(shù);(4)大;(5)0.3,0.003.
分析:(1)求0.6里面有幾個(gè)十分之一(0.1),有幾個(gè)百分之一(0.01),用除法解答即可.
(2)根據(jù)一個(gè)因數(shù)=積÷另一個(gè)因數(shù),據(jù)此解答;
(3)本題根據(jù)除數(shù)是整數(shù)的小數(shù)除法的運(yùn)算法則直接填空.除數(shù)是整數(shù)的小數(shù)除法,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)后面添0再繼續(xù)除.
(4)根據(jù)小數(shù)除法的計(jì)算法則,因被除數(shù)37.28的前兩位比除數(shù)28大,所以商要大于1.據(jù)此解答.
(5)根據(jù)商的變化規(guī)律即可得到答案.
點(diǎn)評(píng):本題主要考查了學(xué)生對(duì)小數(shù)的意義、認(rèn)識(shí)、除法計(jì)算方法及演算方法和商的變化規(guī)律的掌握情況.