Numbers in Standard Form (Leaving Cert Mathematics): Flashcards

$a × 10^n$ where $1 ≤ a < 10$ and $n$ is an integer

$1 ≤ a < 10$

Move decimal left → positive power of 10

Move decimal right → negative power of 10

$4 × 10^3$

$4 × 10^{-2}$

EXP or $10^x$ key

Convert to decimal form first, then operate

Work with coefficients and powers separately

Add the exponents

Subtract the exponents

$0.068$

$1.27 × 10^4$ km