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## Class 7 (Old)

### Course: Class 7 (Old)>Unit 2

Lesson 6: Multiplying decimals

# Intro to multiplying decimals

Multiplying decimals is easy and fun! To multiply 9 by 0.6, first rewrite 0.6 as 6 divided by 10. Next, multiply 9 by 6, which equals 54. Finally, divide 54 by 10 by moving the decimal point one place left, resulting in the answer 5.4. Practice makes perfect in mastering decimal multiplication! Created by Sal Khan.

## Want to join the conversation?

• so is 9x.5=4.5?
• Yes. 9 x 0.5 = 4.5
Good job!
• I am starting grade 6 but what does BIDMAS stand for and mean
• BIDMAS is another way to express the order of operation. It stands for the following: Brackets (Parentheses), Indices (Exponents), Division, Multiplication, Addition, and Subtraction. But PEMDAS is also correct.
• how can you multiply 9 by 0.6, sure, 0.6 is in the tens but its only a fraction of a number...
• boston kailey, you can turn 9 and 0.6 into fractions, then solve them that way, after that you might need to turn it back into a decimal depending on the certain question. Hope this helps!! :)
• Just write it down, don't try to do it in your head.
• alright thanks buddy
• Emotional grammar break down
• His voice is so much deeper! love you sal!! your my hero!! ive learned so much from you!!
• Okay. Sal's our definate learning hero, ha!
• at why cna you just count how many times it goes left
• I still don't really understand. Can you please re explain it more detailed?
• The key to this is the concept that you can divide or multiply anything by 1 without changing the number. So: the problem is 3.5/1.2. Okay, we're going to multiply that by 1. 10/10=1, right? So we can totally multiply 3.5/1.2 by 10/10. You get
3.5/1.2 = 3.5/1.2 x 10/10 = 3.5 x 10/1.2 x 10 = 35/12. Then you go divide those whole numbers. You didn't actually change the problem, since you only multiplied by 1, you just made it easier!
• I'm confused can you help me? pretty please
• Audrey what are you confused with? All your doing is multiplying then moving the place-
here's an example:
5x 0.2 now that looks hard right? Now to make it easy to make the 0.2 a two, so now ask yourself what is 5x2? Well, that's easy! It's ten! Now all you have to do is divide ten by 10. In other words, you must move the decimal left one time. So you have 10.0, what's your answer once you move the decimal (don't forget the decimal is that tiny dot between the numbers!) moving the decimal is just moving the dot. So since we have 10.0, what happens when you move the decimal to the left once? You get 1.00! That would be your answer, so you understand more if you had 0.02 instead of 0.2, then you would move the decimal two times to the left because there are two numbers to the right of the decimal. If you had 0.002, then you would move the decimal three times to the left and so on.
I hoped this helped! If you are still confused, then tell me and/or watch another video!