If you're using Excel to calculate monetary values, then you only have to worry about two decimal places in your numbers. Aligning your numbers to the right automatically lines up the decimal points ...

To mark a value on the number line, eg the number 2, start at zero and take 2 steps to the right. Number lines can also show fractions as values. This number line represents the values between 0 and 1 ...

When you estimate a number you decide approximately, or roughly, how big that number is. To estimate accurately, you need to have a good understanding of the value and order of numbers. A number line ...