Standard Form
Overview
Standard form is a compact way of writing very large or very small numbers. Scientists use it to express quantities like the mass of the Earth or the size of a virus without writing long strings of zeros.
You will learn how to convert between ordinary numbers and standard form, and how to multiply, divide, add and subtract numbers expressed this way, both with and without a calculator.
Objectives
- Calculate with and interpret numbers in the form a x 10^n where n is an integer and 1 <= a < 10
- [Higher] Solve problems involving standard form
Mind map
This topic is mapped out so you can see how the ideas connect.
Open the mind map in the app
Flashcards
Quick recall practice on the facts this topic is tested on.
Practise these cards in the app
Lesson Note
Complete Note Available on the Green Bridge App
Get the Green Bridge CBT app on your phone or computer for the complete IGCSE library: past papers, mark schemes, mind maps, flashcards and audio lessons.
Lesson Evaluation
Congratulations on completing the lesson on Standard Form. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Write 0.000 045 in standard form. A) 4.5 x 10^-4 B) 4.5 x 10^-5 C) 45 x 10^-6 D) 4.5 x 10^5 Answer: B
- Calculate (3 x 10^4) x (2 x 10^5). A) 6 x 10^9 B) 6 x 10^20 C) 5 x 10^9 D) 6 x 10^10 Answer: A
- Which is the largest? A) 3.2 x 10^5 B) 5.1 x 10^4 C) 9.9 x 10^4 D) 1.1 x 10^5 Answer: A
- Write 8.03 x 10^-2 as an ordinary number. A) 803 B) 0.803 C) 0.0803 D) 80.3 Answer: C
- What is (6 x 10^8) / (3 x 10^2) in standard form? A) 2 x 10^4 B) 2 x 10^6 C) 2 x 10^10 D) 2 x 10^16 Answer: B
Work through these questions in the app
Work through these questions in the app
Recommended Books
Practice Mock Questions
Want to practice mock questions on Standard Form? Download the Green Bridge CBT app to access mock questions and full practice assessments for this topic.
Download The App On Google Playstore
Everything you need to excel in your exams
