Understanding Multiplication with Primes

The video tutorial explains a mathematical trick where multiplying a three-digit number by the primes 71 and 13 results in a six-digit number that is the original three-digit number repeated twice. The video provides examples and a detailed explanation of why this trick works, breaking down the calculation process step-by-step.

What is the result when a three-digit number is multiplied by the primes 71 and 13?

• A six-digit number that is the original number reversed

• A six-digit number that is the original number halved

• A six-digit number that is the original number repeated twice

• A six-digit number that is the original number squared

Tags

CCSS.4.NBT.B.5

Why does multiplying 711 by 13 result in 1,1?

• Because it simplifies the multiplication process

• Because it represents a mathematical trick

• Because 1,1 is a placeholder for a larger number

• Because 711 is a special number

Tags

CCSS.2.NBT.A.3

How is the number 1,1 rewritten in the explanation?

• As 1000 + 1

• As 100 + 1

• As 10 + 1

• As 1 + 1

Tags

CCSS.5.NBT.A.2

What is the result of multiplying 375 by 1,000?

• 3,750

• 37,500

• 375

• 375,000

Tags

CCSS.5.NBT.A.2

What is the final result when 375 is multiplied by 1,000 and then added to 375?

• 375,750

• 375,000

• 375,100

• 375,375

Tags

CCSS.5.NBT.A.2