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### Course: Class 4>Unit 2

Lesson 3: Multiply by 1-digit numbers

# Multiplying 3-digit by 1-digit (regrouping)

Learn to multiply a 3-digit number by a 1-digit number using regrouping.  In this video, we will multiply 7x253. Created by Sal Khan.

## Want to join the conversation?

• Has anyone ever wondered 4 digit by 4 digit
• why is this so hard?// maybe just me or bc its a monday.
• he said at 'carry appropriately' can you carry inappropriately
• how do you solve it with 10 digits?//
• What do you mean by 10 digits? Multiple 10 digits with 10 digits?
• did anyone else notice that he said one thousand seven hundred AND seventy one? The proper grammar is one thousand seven hundred seventy one.
• yeah i noticed that as well i'm kinda surprised he made that mistake since hes the one teaching us grammar
• How do you get better at memorizing multiplication facts?
(1 vote)
• Practice is the only thing I can tell you :) There's no easy way to do it. Maybe try playing a math game online, there's tons of them for free. Sushi Monster is a good free app that helps you learn multiplication and division fast.
• If the question is easy enough (2 X 68 = ?) then i would just do it that way and times the two with the six then put awenswer in the thingy thing then i would times the eight and boom thats done... yes i am 11 and i know my puncuation is bad... and spelling.....