The Guinness World Record for largest mental arithmetic multiplication is 12 digits, achieved in 2021. Four Wappingers Central School District students have taken long multiplication to another level.

You will need to calculate using a column method, which is another name for long multiplication. This will allow you to multiply up to 4-digit numbers by 2-digit numbers.

The method most children learn in school, long multiplication, involves many steps with separate products you have to note and recombine later.

Comparing stick multiplication and long multiplication side by side. And in examples where the numbers have small individual digits—preferably all 1s and 2s, to be honest—the stick method is ...

All those long multiplication tables. Timed tests and “mad minutes” of worksheet problem-solving. Fluency drills. Somehow, getting kids to know their basic math facts continues to be at the ...