Use long addition to add your number columns from right to left, carrying as you normally do for long addition.

Long multiplication means you're doing multiplication by hand. The traditional method, or Standard Algorithm, involves multiplying numbers and lining up results according to place value. These are the steps to do long multiplication by hand:

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Using the grid method to do long multiplication gets children to break the numbers down into hundreds, tens and ones before multiplying them. This helps the child to understand what each digit in a number represents and what's actually happening to the numbers when they are multiplied. This helps children who are struggling by letting them visualise the process more easily. Although grid method is fairly simple once you get to grips with it, it can be a bit of a challenge on first sight, so we've written a handy guide to get you through.

As long as you're clear about whether you're working in pounds or pence, multiplying money using the grid method is very similar to any other multiplication in grid method. Current use: The centimeter, like the meter, is used in all sorts of applications worldwide (in countries that have undergone metrication) in instances where a smaller denomination of the meter is required. Height is commonly measured in centimeters outside of countries like the United States. MillimeterMany children get intimidated at the thought of working with decimals. The good part about grid method is that it really isn't much different to using it without the decimal. Once all the numbers have been multiplied, write out a column addition to find the sum of all three. The first number, 23, is made up of the number 20 and the number 3. That means we need to write 20 and 3 in the boxes to the right of the X. Multiply as above, but this time write your answers in a new row, shifted one digit place to the left.