4 detailed lessons on Approximations from the Further Mathematics OCR MEI (b) specification. Each lesson has a starter slide (with starter questions and answers on AS Level questions). There are many discussion and prompting questions with detailed answers to further consolidate students understanding. Each slide can be edited to your liking. L01 - Approximations (18 Slides) L02 - Errors and Rounding (32 Slides) L03 - Working with Errors (21 Slides) L04 - Relative Error (26 Slides)