Just scribble down the numbers from left to right, including any zeros (ignore numbers in red and any after the decimal point).
If your electricity's with Economy7 or Economy10, you might see two readings - one will be your daytime (normal) reading and the other will be your night-time (low) reading. Just write down the numbers from left to right, including any zeros. And keep a note of which reading's which.
Just write down all the numbers you see (don't worry about jotting down the decimal points as we won't need them).
Here's the last, slightly trickier one... Start with the highest-numbered dial first (in this example it'll be 10,000). Then jot down the numbers you see from left to right, including any zeros (ignore any red dials).
So this one reads
Don't forget
To write down the number that the pointer's just passed (this isn't always the nearest number to the pointer). If the pointer is between 5 and 6, you should write down 5 - even if it's closer to 6. And if the pointer is sat over the 5 and the next dial (to the right) is between 9 and 0, you should write down 4 for the dial to the left.