4. Sınıf Matematik Zihinden Çıkarma İşlemi

https://www.youtube.com/watch?v=0Wyvs2K4Ya0&list=UUoWV0DS2JAYrM3wov5BvcvA&index=18

https://www.youtube.com/watch?v=TDkU1_l5uto

https://www.youtube.com/watch?v=V83r7og7P6o&t=160s

https://youtu.be/Uxh0axaCBdo

https://youtu.be/zI63IJDQV6o

https://youtu.be/i6_DBAv95YY