有多少粘贴画1.ppt
,有多少粘贴画,北师大版小学数学二年级上册,,,,,6只,12只,18只,6 + 6 + 6 = 18,3 × 6 = 18,,,,24只,6 + 6 + 6 + 6 = 24,4 × 6 = 24,,,,30只,6 + 6 + 6 + 6 + 6 = 30,5 × 6 = 30,,,6 × 6 = 36,六六三十六,,6 × 7 = 42,六七四十二,,6 × 8 = 48,六八四十八,,6 × 9 = 54,六九五十四,,,,5×6=30 30+6=36 所以: 6×6=36,六六三十六,,六六三十六,6+6+6+6+6+6=36 6×6=36,,,6 × 9 = 54,六九五十四,,6+6+6+6+6+6+6=42,6+6+6+6+6+6+6+6=48,六七四十二,六八四十八,,①,②,③,④,⑤,⑥,⑦,⑧,⑨,一六得六,二六十二,三六十八,四六二十四,五六三十,六六三十六,六七四十二,六八四十八,六九五十四,,二六十二,三六十八,四六二十四,五六三十,六六三十六,六七四十二,六八四十八,六九五十四,1×6 = 6,2×6 = 12,3×6 = 18,4×6 = 24,5×6 = 30,6×6 = 36,6×7 = 42,6×8 = 48,6×9 = 54,6的乘法口诀,一六得六,,,,,,算一算,想一想。,6,12,18,24,30,36,40,48,54,42,,小游戏,对口令,,6×2+6= 6×3=,6×6+6=,6×8-6=,9×6-6=,18,18,42,42,48,6×8=,48,6×7=,42,6×7=6×8-6=6×6+6=36,,6×7-6=,7×6+6=,6×5+6=,6×4+6=,3×6+6=,8×6-6=,36,36,24,48,30,42,想一想,算一算。,,,,,,,18,,,,,,,,,,,算一算每个图中各有多少个小方格。,,,,,18,12,,身边的数学,,身边的数学,2 × 6 = 12,二 六 十 二,,身边的数学,6 × 8 = 48,六八四十八,,再见,,