1 / 11

三位数乘两位数的笔算

三位数乘两位数的笔算. 口算. 16X4= 123X3= 321X2= 170X5= 324X2= 280X3= 143X2=. 64. 369. 642. 850. 648. 840. 286. 笔算. 35X16=. 26X47=. 3 2 X 1 6 1 9 2 3 2 5 1 2.

sophia-roy
Download Presentation

三位数乘两位数的笔算

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 三位数乘两位数的笔算

  2. 口算 • 16X4= • 123X3= • 321X2= • 170X5= • 324X2= • 280X3= • 143X2= 64 369 642 850 648 840 286

  3. 笔算 35X16= 26X47= 3 2 X 1 6 1 9 2 3 2 5 1 2 2 6 X 4 7 1 8 2 1 0 4 1 2 2 2

  4. 145千米/时 李叔叔从某城市乘火车到北京，用了12小时。该城市到北京有多少千米？ 145X12 12X145

  5. 笔算方法 三位数乘两位数与两位数乘两位数的方法类似。 先用两位数个位上的数乘三位数，得数的末尾和个位对齐；再用两位数十位上的数乘三位数，得数的末尾和十位对齐;最后把两次乘得的积相加。

  6. 做一做 134X12= 176X47= 425X36= 237X82= 1608 8272 15300 19434

  7. 门票 125元/人

  8. 1 3 4 X 1 6 8 0 4 1 3 4 9 3 8 1 5 2 X 2 3 1 5 6 1 0 4 1 1 9 6 数学医院 2 4 6 X 3 4 8 8 4 6 3 8 7 2 6 4

  9. 1 3 4 X 1 6 8 0 4 1 3 4 2 1 4 4 1 5 2 X 2 3 4 5 6 3 0 4 3 4 9 6 数学医院 2 4 6 X 3 4 9 8 4 7 3 8 8 3 6 4

  10. 51元/套 学校举办活动，需要购买演出服。参加演出的女生有132人，男生118人。 65元/套

  11. 谢谢！

More Related