Numerical Indices – Negative One Powers and Reciprocals – Four in a Row – 10 Worksheets + Answers

Turn focused indices practice into an engaging classroom challenge with Numerical Indices Four in a Row Level 13. This level focuses on connect an exponent of negative one to a reciprocal. The pack contains 10 distinct print-and-go versions, so pupils can revisit the same mathematical objective without simply repeating an identical worksheet. Each version contains a 6 × 6 answer board, a separate list of 36 questions and a complete answer page.

This is a discrete level. It isolates one new structure so practice remains precise and diagnostically useful. The numerical choices and notation have been selected for valid, appropriate GCSE mathematics: brackets distinguish negative bases from leading minus signs, fractional indices are unambiguous, exact fractions are simplified and questions avoid undefined real-number cases.

EXAMPLE QUESTION TYPES
• Write 5 to the power of (-1) as a fraction.
• Write 1/9 using an exponent of -1.
• Write the reciprocal of 13 in index form.

WHAT IS INCLUDED
• 10 distinct Level 13 worksheets
• 36 questions per version: 360 questions in total
• 10 clear 6 × 6 answer boards
• 10 separate question-list pages
• 10 complete answer pages
• Printer-friendly three-page PDFs
• Non-calculator-friendly exact values where appropriate

HOW FOUR IN A ROW WORKS
Pupils answer a question, locate the matching value on the board and claim that square. The aim is to connect four squares horizontally, vertically or diagonally. The familiar game structure creates a reason to calculate accurately while preserving substantial independent practice. It works well for paired competition, individual retrieval, intervention, cover work, revision, homework or a purposeful lesson finish.

WHY TEACHERS FIND IT USEFUL
• One recognisable activity can run across a mixed-ability room.
• The levelled structure supports precise differentiation without changing the basic classroom routine.
• Ten versions support repeated practice, parallel groups and reduced copying.
• Separate question lists keep the board uncluttered and make checking straightforward.
• Full answers support self-marking, peer assessment and rapid teacher feedback.
• Carefully varied questions build fluency rather than rehearsing one superficial template.

The resource uses UK mathematical language and has been mathematically validated, pagination checked and visually audited. Every board contains 36 definite responses. Equivalent numerical answers are controlled, adjacent duplicate answers are avoided, and version-to-version variation is audited. The result is a professional classroom resource that combines the motivation of a game with the depth and discipline of well-designed deliberate practice.

Suitable for KS3 and GCSE mathematics, with the precise year group depending on the level selected and your scheme of learning. Print at 100% on A4. Pupils may play in pairs with two colours, or work independently by highlighting a route of four correctly answered squares. For.