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.

Main content

Multiplication word problem: pizza

Sal solves a multiplication word problem. Created by Sal Khan.

Want to join the conversation?

  • blobby green style avatar for user co24xiaoh
    I can not understand the question,and i do not know how to answer the question
    (1 vote)
    Default Khan Academy avatar avatar for user
    • starky tree style avatar for user Thomas Coulter
      so basically, there is 7 pizzas, and those pizzas are cut into 12 pieces each so now you multiply 7 x 12 which gives you 84. So now you know that in total there are 84 slices of pizza. Now for the people, there are 16 people who are coming to the party, and each person is going to eat 4 pieces of pizza. To find out how many pieces of pizza are going to be eaten at the party, we will multiply 16 x 4 because there is 16 people and 4 pieces per person, so this equation gives us 64 now we know that in total 64 pieces of pizza will be eaten at the party. and finally we take our 84 pieces of pizza and subtract/eat 64 of those pieces and what is left of that is the answer. the answer is 20
      I really hope that helped!
      (38 votes)
  • blobby green style avatar for user Tyger
    yay pizza. what flavour is it?
    (17 votes)
    Default Khan Academy avatar avatar for user
  • blobby green style avatar for user GerardC
    I don't understand the way he is explaining the problem it looks easy but it isn't at the same time.
    (6 votes)
    Default Khan Academy avatar avatar for user
  • duskpin ultimate style avatar for user Violin8888 :)
    I was doing this last year in third grade y'all!
    (5 votes)
    Default Khan Academy avatar avatar for user
  • female robot ada style avatar for user JJ :)
    Why do they leave transcripts? Someone could copy and paste and
    plagiarize!
    `: "Beatrice is ordering pizzas for a party. Each pizza is cut into 12 pieces. Beatrice wants to have enough pizza so that each person can have 4 pieces. And 16 people will be at the party. A lot of information in this problem. If Beatrice buys 7 pizzas, how many extra pieces will there be after each person eats 4 pieces? So to do this, let's think about how many total pieces she will have. And then let's think about how many total pieces will be eaten by the 16 people. And then we'll figure how much that she had extra. So first, let's think about how many total pieces. And I encourage you to pause the video and try to figure it out yourself. She ordered 7 pizzas. How many total pieces are there going to be? Well, you have 7 pizzas. 7-- that's the number of pizzas. And if you have 12 pieces per pizza, you multiply by 12 to get the total number of pieces. So this is number of pieces per pizza. And 7 times 12 is equal to 84 total pieces. So that's how many pieces she's got. Now let's think about how many get eaten by the 16 people. So you have 16 people. 16-- that's the number of people. And this little symbol, that's shorthand for number. 16 people, and they each eat 4 pieces. So 16 people times 4 pieces per person. So number of pieces per person. 16 times 4 is 64. So that's 64-- not 84-- 64 pieces are eaten by the 16 people. So how much does she have left over? Well, if you start with 84 pieces and 64 get eaten, 84 minus 64 is 20. We deserve a drum roll now. You have 20 extra pieces after" everyone eats their share. does sound SUPER good right? (Quotation marks for credit!)
    (3 votes)
    Default Khan Academy avatar avatar for user
  • blobby green style avatar for user HarrisonL
    How come there is multiplication on both parts for a complicated question and that’s what’s confused me.
    (3 votes)
    Default Khan Academy avatar avatar for user
  • blobby green style avatar for user raheelkhaliq
    ooooh now i get it
    (2 votes)
    Default Khan Academy avatar avatar for user
  • duskpin ultimate style avatar for user Ahmed Sayed
    I just got the exact same question doing Practice: Multi-step word problems and division problems with whole number
    (3 votes)
    Default Khan Academy avatar avatar for user
  • starky sapling style avatar for user amy rodriguez
    I can not understand the question i need help :p
    (1 vote)
    Default Khan Academy avatar avatar for user
    • duskpin sapling style avatar for user Бытие 🦊🍇🧟
      So basically, Beatrice is ordering pizzas for a party. Each pizza is cut into 12 pieces. Beatrice wants to have enough pizza so that each person can have 4 pieces of pizza. And 16 people will be at the party. A lot of information on this problem. If Beatrice buys 7 pizzas, how many extra pieces will there be after each person eats 4 pieces? So to do this, let's think about how many total pieces she will have. And then let's think about how many total pieces will be eaten by the 16 people. And then we'll figure out how much she had extra. So first, let's think about how many total pieces. And I encourage you to pause the video and try to figure it out yourself. She ordered 7 pizzas. How many total pieces are there going to be? Well, you have 7 pizzas. 7-- that's the number of pizzas. And if you have 12 pieces per pizza, you multiply by 12 to get the total number of pieces. So this is the number of pieces per pizza. And 7 times 12 is equal to 84 total pieces. So that's how many pieces she's got. Now let's think about how many get eaten by the 16 people. So you have 16 people. 16-- that's the number of people. And this little symbol, that's shorthand for number. 16 people and they each eat 4 pieces. So 16 people times 4 pieces per person. So several pieces per person. 16 times 4 is 64. So that's 64-- not 84-- 64 pieces are eaten by the 16 people. So how much does she have left over? Well, if you start with 84 pieces and 64 get eaten, 84 minus 64 is 20. We deserve a drum roll now. You have 20 extra pieces after everyone eats their share. So yeah hope this helps :3
      (2 votes)
  • blobby green style avatar for user 432628
    i need help on, 7 times 12
    (1 vote)
    Default Khan Academy avatar avatar for user

Video transcript

Beatrice is ordering pizzas for a party. Each pizza is cut into 12 pieces. Beatrice wants to have enough pizza so that each person can have 4 pieces. And 16 people will be at the party. A lot of information in this problem. If Beatrice buys 7 pizzas, how many extra pieces will there be after each person eats 4 pieces? So to do this, let's think about how many total pieces she will have. And then let's think about how many total pieces will be eaten by the 16 people. And then we'll figure how much that she had extra. So first, let's think about how many total pieces. And I encourage you to pause the video and try to figure it out yourself. She ordered 7 pizzas. How many total pieces are there going to be? Well, you have 7 pizzas. 7-- that's the number of pizzas. And if you have 12 pieces per pizza, you multiply by 12 to get the total number of pieces. So this is number of pieces per pizza. And 7 times 12 is equal to 84 total pieces. So that's how many pieces she's got. Now let's think about how many get eaten by the 16 people. So you have 16 people. 16-- that's the number of people. And this little symbol, that's shorthand for number. 16 people, and they each eat 4 pieces. So 16 people times 4 pieces per person. So number of pieces per person. 16 times 4 is 64. So that's 64-- not 84-- 64 pieces are eaten by the 16 people. So how much does she have left over? Well, if you start with 84 pieces and 64 get eaten, 84 minus 64 is 20. We deserve a drum roll now. You have 20 extra pieces after everyone eats their share.