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三位数乘两位数

三位数乘两位数. 牵牛镇学校 潘丽清. 口算 :. 47 ×20. 23 ×3. 180 ×4. 420 ×2. 笔算 56 × 25 = 64 × 39 =. 学习目标. 我 能正确地笔算三位数乘两位数。. 1. 2. 讨论归纳:. 1 4 5. ×. ……. 2 乘 145 的积. 0. 2. 9. ……. +. 1. 4. 5. 10 乘 145 的积. 0. 1. 7. 4. 1 、先用两位数 个 位上的数去乘三位数,得数的末位和两位数的 个 位对齐。.

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三位数乘两位数

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  1. 三位数乘两位数 牵牛镇学校 潘丽清

  2. 口算: 47×20 23×3 180×4 420×2 笔算 56 ×25 = 64 ×39 =

  3. 学习目标 我能正确地笔算三位数乘两位数。

  4. 1 2 讨论归纳: 1 4 5 × …… 2乘145的积 0 2 9 …… + 1 4 5 10乘145的积 0 1 7 4 1、先用两位数个位上的数去乘三位数,得数的末位和两位数的个位对齐。 2、再用两位数十位上的数去乘三位数,得数的末位和两位数的十位对齐。 3、然后把两次乘得的数加起来。

  5. 124×23 = 226×35 = 及时训练

  6. 1 3 4 1 3 4 × 1 6 × 1 6 8 0 4 8 0 4 积的书写 位置错误 … + 1 3 4 + 1 1 3 4 2 1 4 4 9 3 8 〖 〗 第一关 我是合格小医生 改正 1 ×

  7. 2 4 6 2 4 6 × 1 3 4 × 3 4 … 8 6 4 9 8 4 … + + 6 2 8 1 1 7 3 8 7 1 4 4 8 3 6 4 〖 〗 改正 2 没有 进位 ×

  8. 第二关 237×82= 425×36= 176×47= 134×12= 19434 小 组 来 竞 赛 15300 8272 1608 加油啊!

  9. 第三关 我来当经理 鲜花店经理花3000元批发了 225束鲜花,如果每束鲜花 卖15元,卖完这批鲜花, 经理可赚到多少钱?

  10. 154×13= 236×35= 课堂检测

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