Googleクラスルーム
GeoGebraGeoGebra Classroom
GeoGebra

The digit sequence 123456789

作成者:spkwan
トピック:算数

Insert plus/minus sign(s) in between the digit sequence yielding an arithmetic expression equal/closest to ...

Reference 1: cut-the-knot

https://www.cut-the-knot.org/do_you_know/digits.shtml

Reference 2: world of numbers

http://www.worldofnumbers.com/ninedig1.htm

Reference 3: nrich

Reference 3: nrich
https://nrich.maths.org/1013

新しい教材

教材を発見

トピックを見つける