The basic method for adding numbers with 4 digits or more is to use column addition. Watch this video to remind yourself about how to use column addition to add up numbers with 3 digits.

Indian teenager Aaryan Shukla set six world records in mental calculations in a single day, attributing his success to daily ...

5 add 4 equals 9 as well. BOTH: Aha! NARRATOR: That’s right, it doesn’t matter which pair of numbers you add together first: you could do 4 add 3 add 2, or 2 add 3 add 4, the answer’s just ...

To test his mental math-solving skills, the Guinness World Records team recently invited Aaryan to Dubai, where he was asked ...