Textbook-style significant figures and scientific notation worksheets for high school chemistry: clear notes, 30 differentiated exercises and worked keys. What’s inside (11 pages) 2 pages of textbook-style notes: counting significant figures, scientific notation and rounding, and precision in calculations, with key points, worked examples, common mistakes and a quick check Version A (10 exercises): counting significant figures, including exact numbers Version B (10 exercises): scientific notation both ways and rounding Version C (10 exercises): calculations with the correct precision, using lab-style data Fully worked answer keys for every exercise Teacher notes with guidance on which version suits which class Why teachers use it Quiet differentiation: student pages have no level labels, only a small A/B/C code in the footer Clean, textbook-quality layout that prints well in black and white Made by a chemist, with every answer checked for correct significant figures Works for homework, stations, sub plans, review or a skills unit at the start of the year Suitable for ages 14 to 18: high school chemistry (grades 9-12), GCSE and A-level chemistry, and international schools. Printable PDF. Want to try before you buy? Download the free Significant Figures Challenge Problems from the Opalchemy shop.

Six real-world significant figure problems for high school chemistry, with fully worked solutions. Free sample of Opalchemy’s textbook-style worksheets. What’s inside (5 pages) 6 applied problems where precision rules collide: mixed operations, subtraction that loses digits, percent error, exact counts and comparing measurements Space to work on every page Fully worked answer key Great for Extension for early finishers Partner problem solving or warm-ups Honors or advanced chemistry homework Every problem uses only standard significant-figure rules; the challenge is in reading the situation, not in new mathematics. Printable PDF, black-and-white friendly. This pack is an add-on to the full Significant Figures & Scientific Notation set (textbook-style notes, 30 differentiated exercises and worked keys) in the Opalchemy shop.