Reach for the Star | GCSE Mathematics

L105: Calculator fluency and accuracy

Objective

Use a calculator efficiently while checking magnitude, accuracy and units.

Calculator: Calculator allowed where labelled; non-calculator reasoning remains required.

Visual model for Calculator fluency and accuracy
Points route: Connect 2 · Share 2 · Apply 6 · Review 3 · Stretch 2 · Deep Challenge 3. Record your score honestly after you have checked your answer.

Recall

Retrieve the key fact or method needed for calculator fluency and accuracy.

Core practice

Find the value of 250×1.035⁴ to the nearest penny.

Reasoning

A result is 0.00048372. Round to three significant figures and explain the first significant digit.

Exam-style

Solve an exam-style problem involving calculator fluency and accuracy. Show working, include a check and interpret your answer.

WWW / EBI

Recall & Review: feedback and extension integration

Lesson L105: Calculator fluency and accuracy

Objective: Use a calculator efficiently while checking magnitude, accuracy and units.

60-minute structure: 0-7 Connect & Check; 7-14 Share; 14-25 Present/model; 25-44 Apply route choice/practice; 44-52 independent exam-style check; 52-60 Recall & Review, WWW/EBI and next step.

What Went Well (WWW)

I selected an efficient numerical method, showed the key steps clearly and checked the sign, size or accuracy of my answer.

Even Better If (EBI)

I will make the place-value, sign or operation decision explicit and use estimation or an inverse calculation to check a fresh question.

Stretch and deep challenge

Stretch: Find the value of 250×1.035⁴ to the nearest penny.

Deep challenge: A result is 0.00048372. Round to three significant figures and explain the first significant digit.