If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

# Multiplying 10s

Lindsay multiplies multiples of 10 by other multiples of 10, such as 30x50.

## Want to join the conversation?

• why do you have to have a pattern?
• It's good to have a frequent consistent pattern in math so you don't forget it and can get a consistent stream of correct answers.
• wait so if i were to do 40 times 70 it would be 1100?
• no 7 x 4 = 28 and then add zero's it would be 2800
• An easier way to do it is to just to do for example in 50x30 do 5x3 which is 15 then make it into a thousand
• Good thought! In your 50 x 30 you will note that you have two zeros on those numbers. If you then multiply 5 x 3 to get 15 you just need to add those two zeros back on to get 1500.

There are lots and lots of "tricks" like that you will discover as you go along. Then math becomes kind of fun and easy.
• also i have another question if i were to multiply 10 would that mean it would just be counting up by tens so like if i did 2 times 10 it would be 20 cause it's in the tens place?
• Yep! you're correct :) Multiplications Tables is also adding numbers the same numbers to each other so... 10+10+10 or 5+5+5, find a Times Table Grid on Google that you like and use it to help you learn your Times Tables.

A tip to help you learn them is 2, 4, 6 and 8 Times Tables have a 5 Digit repeating number pattern from the first 5 numbers then repeats in the right side numbers. 1 at a time learn them and say the patterns to yourself then practise them by using them when Multiplying numbers and filling them in, eventually you won't have to use the pattern for 2 and 4 times table that much once you feel you've learned them well but you'll still need it for 6s and 8s.

2 Times Table goes... 2 4 6 8 0
4 Times Table goes... 4 8 2 6 0
6 Times Table goes... 6 2 8 4 0
8 Times Table goes... 8 6 4 2 0

3 and 7 times tables is tough to learn because it has a 10 digit number pattern but 3 times table because it's a small number it's easy to add 3+3+3 in your head but with 7 times table use the other times tables to help you work it out, but remember that 7x7 is 49.
• 900+800=1700-700=1000+400+170=i dont know
• I know my 900+ 800 190 + 390 + 902 900 400 800 700 200
• Were are the questions?
• Idk I'm asking the same thing person from 2 years ago.
• Hi I have a lot of fun with you guys I hope you’re having fun to
• This is still confusing, Can someone please explain this a little further?
• okok. mulitplying by 10's are like multiplying but you add a zero ( e.g.: 60*8=480). still don't get it?