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表内乘法（一）

表内乘法（一）. 请你计算下面各题， 我们来比一比，看谁 算得又快又对。. 20. 24. ① 5 ＋ 5 ＋ 5 ＋ 5 ＝ ⑤ 6 ＋ 6 ＋ 6 ＋ 6 ＝ ② 3 ＋ 3 ＋ 3 ＋ 3 ＝ ⑥ 2 ＋ 2 ＋ 2 ＋ 2 ＋ 2 ＝ ③ 4 ＋ 4 ＋ 4 ＝ ⑦ 5 ＋ 5 ＋ 5 ＝. 12. 10. 12. 15. 12. 17. ④ 4 ＋ 5 ＋ 3 ＝. ⑧ 7 ＋ 9 ＋ 1 ＝. +5. +5. +5. +5. 5. 20. 25.

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表内乘法（一）

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  1. 表内乘法（一）

  2. 请你计算下面各题， 我们来比一比，看谁 算得又快又对。 20 24 ① 5＋5＋5＋5＝ ⑤ 6＋6＋6＋6＝ ② 3＋3＋3＋3＝ ⑥ 2＋2＋2＋2＋2＝ ③ 4＋4＋4＝ ⑦ 5＋5＋5＝ 12 10 12 15 12 17 ④ 4＋5＋3 ＝ ⑧ 7＋9＋1＝

  3. +5 +5 +5 +5 5 20 25 10 15

  4. 5的乘法口诀 1×5＝10 5×1＝10 1个5 一五得五 二五一十 5×2＝10 2×5＝10 2个5 三五十五 5×3＝15 3×5＝15 3个5 5×4＝20 4×5＝20 4个5 四五二十 5×5＝25 五五二十五 5个5

  5. （一）把口诀补充完整 一五（ ） 三五（ ） 五五（ ）四五（ ） 二五（ ） 得五 十五 二十 二十五 一十

  6. （二）计算并说出口诀 5×3＝ 15 1×5＝ 5 5×2＝ 10 5×4＝ 20 5×1＝ 5 5×5＝ 25 4×5＝ 20 2×5＝ 10

  7. 4 2 3 1 1 2 4 3 5 5

  8. 5×5＝25 五五二十五

  9. 5×4＝20 四五二十 4×5＝20

  10. 15 3 5 （三）填空 三五十五

  11. （四）小兔子拔萝卜 15 20 25

  12. 作业：第52页“做一做”第1题、第2题。 第53页练习十，第3题、第4题。

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