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Lesson 5: Distributive property

# Distributive property when multiplying

Sal uses the distributive property to break up 4x7 into smaller numbers.

## Want to join the conversation?

• What is the easiest way to learn my 7 times table? This is very hard.
• Many kids have difficulty with 7’s, but this does not have to be you if you use a strategy.

There are multiple strategies. Here are three of them. These strategies come from the idea that multiplication is the same as counting groups of objects (distributive property).

1) If you’re good with 2’s and 5’s, a possible way to multiply a number by 7 is to multiply it by 2, multiply it by 5, then add the results. This is based on the fact that 2 + 5 = 7.

Example: let’s do 8 x 7.
8 x 2 = 16
8 x 5 = 40
16 + 40 = 56, the answer.

2) If you’re good with 10’s and 3’s, a possible way to multiply a number by 7 is to multiply it by 10, multiply it by 3, then subtract the results. This is based on the fact that 10 - 3 = 7.

Example: let’s do 8 x 7 again.
8 x 10 = 80
8 x 3 = 24
80 - 24 = 56, the answer.

3) lf you’re good with 6’s, a possible way to multiply a number by 7 is to multiply it by 6 and add the original number. This is based on the fact that 6 + 1 = 7.

Example: let’s do 8 x 7 again.
8 x 6 = 48
original number = 8
48 + 8 = 56, the answer.

These are not the only strategies. From looking at the ideas in the three strategies l wrote, you might even come up with your own strategy that you like better.

Have a blessed, wonderful day!
• how do we do distributive property in multiplying, i don't understand?? Such a 7x4
• Using the distributive property can help you figure out multiplication facts that you forget.

For example, if you remember your 2’s and 5’s but forget your 7’s, you can use this property to help you figure out your 7’s (because 2 + 5 = 7).

For example:
7x4 = (5+2)x4 = (5x4)+(2x4) = 20+8 = 28.
The idea is that 7 fours equals 5 fours plus 2 fours.

Have a blessed, wonderful day!
• The cats are on the lose
• no they aren't
(1 vote)
• Why is the cat angry?
• he didn't get food
(1 vote)
• This is to hard and it’s easier to skip count
• Hi Luke! I understand that skip counting probably seems easier right now. Remember that when you get into harder grades, you will be doing harder multiplication. For instance, 15 × 17. But, don't worry! For now just do what you can. If skip counting is easier for you right now, go for it. Hope this helps. Have an amazing day! 😁
• I like the cats but its just so much better to skip count.
• the cats are better than what you said
• what is a distributive property? i'm only in second grade.
• How do I learn my 9s table easily?
• Well with 1-10 there is a very simple trick...

hold out your hands in front of you.... if you are doing 9 * 1 .... put down your left pinky and count how many fingers are to the right of that pinky .... 9!
if you do 9 * 2 then put down your left ring finger... all the finger(s) to the right of you closed finger are the tens all to the left are ones so 9*2=18
so on so forth
• mini quiz
1. 2 x 3 =
2. 8 x 1 =
3. 4 x 4 =
4. 7 x 2 =
5. 8 x 4 =
6. 4 x 6 =
7. 6 x 7 =
8. 9 x 9 =
9. 10 x 2 =
10. 5 x 3 =
• 1. 6
2. 8
3. 16
4. 14
5. 32
6. 24
7. 42
8. 81
9. 20
10. 15