Provide a fun yet educational colouring activity with this KS2 Dirty Ocean Colour by Numbers Activity. This sheet has images of a polluted ocean for children to colour in. They will complete the sheet by adding and subtracting 3-digit and 4-digit numbers.

They will identify the correct colour to be used by using the key provided. Use as part of your sustainability work, as a recap in your maths lessons or in an after school club.