Theory
Place value means the position of a digit tells you its value. In 4826, the 4 means 4000, the 8 means 800, the 2 means 20, and the 6 means 6.
A digit by itself is not enough. The digit 7 could mean 7, 70, 700, or 7000 depending on where it is written.
For whole numbers, the columns from right to left are ones, tens, hundreds, thousands, ten thousands, hundred thousands, and millions.
To compare two whole numbers, first look at how many digits they have. A 5-digit number is always bigger than a 4-digit number if both are positive.
If two numbers have the same number of digits, compare from the left. The first different digit decides which number is bigger.
Ascending order means smallest to largest. Descending order means largest to smallest. In Edexcel questions, students often lose marks by using the wrong direction, so circle or underline the command word before ordering.