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GCSE

Positive and Negative Integers

Question

How do you multiply using numbers in standard form?

2 years ago

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1 Reply

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Rosanna Gislason


1 Answer

Oscar P Profile Picture
Oscar P Verified Sherpa Tutor ✓

Energetic Oxford Engineering Student teaching Maths and Physics.

Say we multiply two numbers in standard form, 3x10^8 x 4x10^7. We can effectively multiply both parts separately, so 3*4=12 and 10^8x10^7=10^15 (by adding the indices for multiplication). Therefore we get 12x10^15, or 1.2x10^16

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