BBC

Multiply a 3-digit number by a 1-digit number

When you multiply a 3-digit number by a 1-digit number, the best way to do this without a calculator is to use short multiplication. This is how you would use short multiplication to find out the ...
BBC

Multiply a 3-digit number by a 1-digit number

When you multiply a 3-digit number by a 1-digit number, the best way to do this without a calculator is to use short multiplication. This is how you would use short multiplication to find out the ...
Houston Chronicle

How to Identify a Credit Card by the Account Number

When accepting credit card numbers over the phone from customers, you can easily identify the type of card without asking the customer. While each credit card has a unique string of numbers, in ...