About this video
Sal reads a bar graph to find that Bike World has 19 bikes and Bikes R Us has 12. He finds how many more bikes Bike World has by subtracting 19 - 12 = 7, then checks by counting up from 12 to 19.
You'll be able to
- read a number from a bar graph.
- find how many more by subtracting the smaller number from the bigger number.
- check a 'how many more' answer by counting up.
Key words
- bar graph
- A graph where the height of each bar shows how many there are.
- how many more
- The difference between two amounts: how much bigger one is than the other.
- subtract
- To take one number away from another to find what is left or the difference.
Transcript
- [Voiceover] How many more bikes does Bike World have than Bikes R Us? So let's compare Bike World to Bikes R Us. So Bike World is right over here and we see that Bike World, if we just look at this right over here, Bike World has 19 bikes, has 19 bikes. And they wanted us to compare Bike World to Bikes R Us and say how many more bikes does Bike World have than Bikes R Us?
So Bike World has 19, how many does Bikes R Us have? This is Bikes R Us right over here, Bikes R Us has, Bikes R Us has 12 bicycles. So how many more does Bike World have than Bikes R Us? Well we can just subtract Bikes R Us's number of bikes from Bike World's, 19 minus 12.
What is that going to be? Well if we look at the ones place, nine ones minus two ones is seven ones, and then one ten minus one ten is no tens. I could write no tens there but I don't have to write that. So there's seven more bikes at Bike World than Bikes R Us.
And you can also see it here. If you start at Bikes R Us, If you were to start at Bikes R Us and you wanted to go and you wanted to see how many more bikes would I have to get to the same number of bikes as Bike World, you would see that you would have to go from 12 to 19, or you would have to add seven bikes, or that Bike World has seven more bicycles than Bikes R Us, one, two, three, four, five, six, seven.
So how many more bikes does Bike World have than Bikes R Us? It has seven more bikes.
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