Video Transcript
Daniel reads nine pages every day. How many pages will he read in two days?
Let’s use this bar to represent the number of pages that Daniel reads every day. The question tells us that this is nine pages. Another way of representing this might be to use nine counters. So, Daniel reads nine pages every day. And we’re asked, how many pages will he read in two days? So, our bar model now needs to include another bar that’s worth nine.
And to calculate the answer, we need to find this distance here. To show two lots of nine using counters, instead of putting them in one long line, we can set them out as an array. There are two rows. And in each row, there are nine counters. To find the answer to our problem, we need to find two lots of nine, or two times nine.
Now, we know that one times nine equals nine. So, to find the answer to two times nine, we need to add another nine. Let’s start with nine and count on nine, 10, 11, 12, 13, 14, 15, 16, 17, 18. Nine plus nine equals 18. So, two times nine, or two lots of nine, equals 18. Daniel reads nine pages every day. The number of pages that he will read in two days is the same as two times nine. He’ll read 18 pages.
