The same idea works when multiplying by more than two digit numbers.
Traditional Method Multiplication. The origins of the multiplication method aren't clear. In order to perform multiplication calculations without a calculator or spreadsheet you will need to know how to add numbers.
Multiplication 2 Digits By 1 Digit Standard Algorithm Traditional Method Youtube from i.ytimg.com
The box method makes this immediately clear, while the traditional method muddles this simple fact up in a jumble of carrying and odd partial multiplications and sums. Students are having difficulty memorizing their multiplication facts. It may seem that it is tough.
Age 7 to 14 challenge level:
Traditional method of multiplication 2. Thankfully, we discovered lattice multiplication. This method is based on the decomposition of base 2 numbers. Talking through the method is far easier than trying to follow written instructions.
