Maths Essentials, Unit 4, Lesson 5 of 5

Calculating with standard form

GCSE Maths, Powers, roots and standard form, 25 minutes

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Multiply, divide, add and subtract in standard form without a calculator, and solve problems about space, cells and data.

What you will learn

  • Multiply and divide in standard form
  • Add and subtract in standard form
  • Use a calculator with standard form and round sensibly

Multiplying and dividing

Multiply (or divide) the numbers in front, then use the index laws on the powers of 10.

Then make sure the answer is in standard form.

  1. (4 × 10⁵) × (6 × 10³) = 24 × 10⁸
  2. = 2.4 × 10⁹
  3. (3 × 10⁴) ÷ (6 × 10⁻²) = 0.5 × 10⁶ = 5 × 10⁵

The rest of this lesson and its 7 practice questions are locked.

In this lesson

  1. Multiplying and dividing
  2. Adding and subtracting
  3. Try it: Standard form on the calculator

7 practice questions, marked as you go; about 25 minutes in all.

In this unit: Powers, roots and standard form

Squares, cubes and roots, the laws of indices (negative and fractional too), and very large and very small numbers in standard form.

All of Powers, roots and standard form

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