Easy Math Trick (Two number multiplication)
To multiply two two-digit numbers, such as 23 and 45, a helpful method involves breaking each number into its tens and units. For instance:
23 can be expressed as (20 + 3).
45 can be expressed as (40 + 5).
Next, multiply each part of one number by every part of the other number:
Multiply 20 (from 23) by both parts of 45 (20 * 40 = 800, 20 * 5 = 100).
Multiply 3 (from 23) by both parts of 45 (3 * 40 = 120, 3 * 5 = 15).
Finally, sum up (meaning add them, you should know this by the way) all the results:
800 + 100 + 120 + 15 = 1035.
This method, though it might seem a bit intricate initially, is particularly advantageous for younger children as it breaks down the multiplication process into simpler steps, making mental calculations more accessible with practice.