Maths Challenge - Maths Challenge 1 - Addition and subtraction of the number 9 - ÃÛÑ¿´«Ã½ Sounds

Maths Challenge - Maths Challenge 1 - Addition and subtraction of the number 9 - ÃÛÑ¿´«Ã½ Sounds
Maths Challenge 1
Addition and subtraction of the number 9
Ralph van Dijk has the questions and the subject of today's quiz is the addition and subtraction of the number 9.