WALT use our multiplicative thinking to solve the unknown value.
here is a example 5a+30=90 a=12 5x12=60+30=90
You might be thinking what the ''a'' is doing there it is a sign
I am a Year 8 student at Tamaki Primary School in Auckland, NZ. I am in the Kia Manawanui syndicate and my teachers are Mr Janse and Ms Schellingerhout.