そろばん


https://zennoueighteen.blog.fc2.com/blog-entry-136.html?sp







計算


https://zennoueighteen.blog.fc2.com/blog-entry-91.html?sp



計算1


https://zennoueighteen.blog.fc2.com/blog-entry-92.html?sp




計算2

https://zennoueighteen.blog.fc2.com/blog-entry-93.html?sp




計算3

https://zennoueighteen.blog.fc2.com/blog-entry-94.html?sp




計算4


https://zennoueighteen.blog.fc2.com/blog-entry-95.html?sp



計算5


https://zennoueighteen.blog.fc2.com/blog-entry-96.html?sp



計算6


https://zennoueighteen.blog.fc2.com/blog-entry-97.html?sp



計算7

https://zennoueighteen.blog.fc2.com/blog-entry-98.html?sp



計算8

https://zennoueighteen.blog.fc2.com/blog-entry-103.html?sp



計算9

https://zennoueighteen.blog.fc2.com/blog-entry-104.html?sp



計算10

https://zennoueighteen.blog.fc2.com/blog-entry-108.html?sp



計算11
https://zennoueighteen.blog.fc2.com/blog-entry-121.html?sp


計算12
https://zennoueighteen.blog.fc2.com/blog-entry-122.html?sp


計算13

https://zennoueighteen.blog.fc2.com/blog-entry-125.html?sp



計算14

https://zennoueighteen.blog.fc2.com/blog-entry-130.html?sp


計算15

https://zennoueighteen.blog.fc2.com/blog-entry-135.html?sp









割り切れる


https://zennoueighteen.blog.fc2.com/blog-entry-87.html?sp







アメリカ旅行の注意点　お釣り計算方法の違い


https://ameblo.jp/tricolorlanguage/entry-11559564704.html




ドイツは足し算、日本は引き算～？！」

http://playtopia.jp/topics43.html






掛け算

10 　10　　　 100
100　 100 　　 10000
1000 1000 1000000
10000 10000 　 100000000
一億は0が8
百億が0が10






https://youtu.be/g4pesr-CPvM?si=qqXTK1ShxBUyVXm6









担任よ、ウソをドヤ顔で教えないでくれ・・


https://ameblo.jp/keikichi611/entry-12807273111.html



https://megalodon.jp/2023-0615-2009-02/https://ameblo.jp:443/keikichi611/entry-12807273111.html


https://archive.md/fMqyo







親戚の子「1＋1＝2じゃなくて1じゃないの？」　甥「素晴らしい！○君は数学センスが抜群だ」




http://www.kitimama-matome.net/archives/59618956.html


http://mojokosan.doorblog.jp/archives/56885489.html


http://ikarishintou.com/archives/89423229.html