KS1 Maths. Numbertime. This series consolidates mental maths skills for children aged 5 to 7 through a variety of fun games, activities and songs. 5: Bonds to 10. BBC School Radio. BBC Teach.
This clip shows how to subtract 10 from a two-digit number. The clip is illustrated by 68 ants departing on leaf boats in tens. The ants are sent off in teams of 10 to participate in an ant regatta.