Mastering Multi-Digit Multiplication Techniques

This video tutorial from Math Antics teaches how to multiply multi-digit numbers by other multi-digit numbers. It reviews the procedure for multiplying by a one-digit number and extends it to two-digit numbers, using an example of multiplying 324 by 46. The tutorial explains each step in detail, including carrying over digits and adding the results. It concludes with encouragement to practice and additional resources for subscribers.

What is the first step in multiplying a multi-digit number by a one-digit number?

• Multiply the bottom digit by the leftmost top digit

• Multiply the bottom digit by the rightmost top digit

• Subtract the digits

• Add the digits together

Tags

CCSS.4.NBT.B.5

When multiplying a multi-digit number by another multi-digit number, what do you do with the results from each digit of the bottom number?

• Add them together

• Ignore them

• Multiply them together

• Subtract them

Tags

CCSS.4.NBT.B.5

In the example of multiplying 324 by 46, what is the result of the first multiplication step (6 × 4)?

• 20

• 24

• 26

• 28

Tags

CCSS.4.NBT.B.5

What do you do with the digit you carry over in a multiplication step?

• Ignore it

• Subtract it from the next multiplication result

• Add it to the next multiplication result

• Multiply it by the next digit

Tags

CCSS.5.NBT.B.5

Why do you need to add a zero in the second answer line when multiplying by the second digit of the bottom number?

• To make the answer smaller

• To make the answer 100 times bigger

• To make the answer 1000 times bigger

• To make the answer 10 times bigger

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 4 by 4 in the second set of steps?

• 12

• 16

• 14

• 18

Tags

CCSS.3.OA.A.1

What should you do with the digits carried over from the first answer line before starting the second set of steps?

• Cross them out

• Ignore them

• Add them to the second answer line

• Multiply them by the second digit

Tags

CCSS.2.NBT.B.5

CCSS.1.NBT.C.4

What is the final step after completing all multiplication steps?

• Subtract the two answer lines

• Ignore the two answer lines

• Multiply the two answer lines

• Add the two answer lines

Tags

CCSS.5.NBT.B.7

What is the final answer when you multiply 324 by 46?

• 17,904

• 14,904

• 15,904

• 16,904

Tags

CCSS.5.NBT.B.5

What should you do if you find the procedure complicated?

• Give up

• Re-watch the video and practice

• Ignore the problem

• Ask someone else to do it