9的乘法口诀表课件（PPT 39页）.pptVIP

中央电教馆资源中心制作 2006. 6 5 × 8 = 40 8 × 5 = 40 40 ÷ 5 = 8 40 ÷ 8 = 5 5 × 9 = 45 9 × 5 = 45 45 ÷ 5 = 9 45 ÷ 9 = 5 * * 乘法口诀表 一一得一 一二得二 一三得三 一四得四 一五得五 一六得六 一七得七 一八得八 一九得九 二二得四 二三得六 二四得八 二五一十 二六十二 二七十四 二八十六 二九十八 三三 得九 三四 十二 三五 十五 三六 十八 三七二十一 三八二十四 三九二十七 四四 十六 四五 二十 四六二十四 四七二十八 四八三十二 四九三十六 五五二十五 五六 三十 五七三十五 五八 四十 五九四十五 六六三十六 六七四十二 六八四十八 六九五十四 七七四十九 七八五十六 七九六十三 八八六十四 八九七十二 九九八十一 退出 1 × 2 = 2 2 × 1 = 2 2 ÷ 1 = 2 2 ÷ 2 = 1 1 × 3 = 3 3 × 1 = 3 3 ÷ 1 = 3 3 ÷ 3 = 1 1 × 4 = 4 4 × 1 = 4 4 ÷ 1 = 4 4 ÷ 4 = 1 1 × 5 = 5 5 × 1 = 5 5 ÷ 1 = 5 5 ÷ 5 = 1 1 × 6 = 6 6 × 1 = 6 6 ÷ 1 = 6 6 ÷ 6 = 1 1 × 7 = 7 7 × 1 = 7 7 ÷ 1 = 7 7 ÷ 7 = 1 1 × 8 = 8 8 × 1 = 8 8 ÷ 1 = 8 8 ÷ 8 = 1 1 × 9 = 9 9 × 1 = 9 9 ÷ 1 = 9 9 ÷ 9 = 1 2 × 3 = 6 3 × 2 = 6 6 ÷ 2 = 3 6 ÷ 3 = 2 2 × 4 = 8 4 × 2 = 8 8 ÷ 2 = 4 8 ÷ 4 = 2 2 × 5 = 10 5 × 2 = 10 10 ÷ 2 = 5 10 ÷ 5 = 2 2 × 6 = 12 6 × 2 = 12 12 ÷ 2 = 6 12 ÷ 6 = 2 2 × 7 = 14 7 × 2 = 14 14 ÷ 2 = 7 14 ÷ 7 = 2 2 × 8 = 16 8 × 2 = 16 16 ÷ 2 = 8 16 ÷ 8 = 2 2 × 9 = 18 9 × 2 = 18 18 ÷ 2 = 9 18 ÷ 9 = 2 3 × 4 = 12 4 × 3 = 12 12 ÷ 3 = 4 12 ÷ 4 = 3 3 × 5 = 15 5 × 3 = 15 15 ÷ 3 = 5 15 ÷ 5 = 3 3 × 6 = 18 6 × 3 = 18 18 ÷ 3 = 6 18 ÷ 6 = 3 3 × 7 = 21 7 × 3 = 21 21 ÷ 3 = 7 21 ÷ 7 = 3 3 × 8 = 24 8 × 3 = 24 24 ÷ 3 = 8 24 ÷ 8 = 3 3 × 9 = 27 9 × 3 = 27 27 ÷ 3 = 9 27 ÷ 9 = 3 4 × 5 = 20 5 × 4 = 20 20 ÷ 4 = 5 20 ÷ 5 = 4 4 × 6 = 24 6 × 4 = 24 24 ÷ 4 = 6 24 ÷ 6 = 4 4 × 7 = 28 7 × 4 = 28 28 ÷ 4 = 7 28 ÷ 7 = 4 4 × 8 = 32 8 × 4 = 32 32 ÷ 4 = 8 32 ÷ 8 = 4 4 × 9 = 36 9 × 4 = 36 36 ÷ 4 = 9 36 ÷ 9 = 4 5 × 6 = 30 6 × 5 = 30 30 ÷ 5 = 6 30 ÷ 6 = 5 5 × 7 = 35 7 × 5 = 35 35 ÷ 5 = 7 35 ÷ 7 = 5