有多少粘贴画课件.ppt

单击此处编辑母版标题样式,,单击此处编辑母版文本样式,,第二级,,第三级,,第四级,,第五级,,,*,有多少,“,粘贴画”,,——6,的乘法口诀,,,,,,,,,成都市温江区永宁小学 林俊,,,请把口诀补充完整：,一三（ ）,五六（ ）,一四（ ）,四六（ ）,（ ）十八,二五（ ）,三七（ ）,二四（ ）,得三,三十,得四,二十四,得八,二十一,一十,二九,三六,,,１排有６只,２排有１２只,３排有１８只,４排有２４只,５排有３０只,６排有３６只,７排有４２只,８排有４８只,９排有５４只,,6,×,8,＝,6,×,7,＋ ＝,6,×,9,－,,,6,6,8,个,6,7,个,6,9,个,6,想一想：,,想一想,,,算一算,7,×,６＋６＝,６,×,４＋６＝,３,×,６＋６＝,６,×,５＋６＝,８,×,６－６＝,６,×,７－６＝,48,36,36,30,24,42,7,个,6,7,个,6,5,个,6,4,个,6,3,个,6,8,个,6,,算一算,,,想一想,×,1,2,3,4,5,6,7,8,9,6,,,,,,,,,,6,12,18,24,30,36,42,48,54,,,＝,24,＝,36,＝,54,＝,12,＝,18,,算一算有多少个格子,,,,,,( ) ( ) ( ),18,,算一算有多少个格子,,,,,,( ) ( ) ( ),18,18,,,算一算有多少个格子,18,18,12,6,×,2,＝,12,,2,×,6,＝,12,,,,,,( ) ( ) ( ),,算一算有多少个格子,,,,,,( ) ( ) ( ),18,18,12,6,×,2,＝,12,,2,×,6,＝,12,4,×,3,＝,12,,3,×,4,＝,12,,。