Question Video: Multiplying by Six Mathematics • 3rd Grade

Notice how each row is 6 more than the previous one. 1 × 6 = 6, 2 × 6 = 12, 3 × 6 = 18. Find the result of the following: 4 × 6 = _ Find the result of the following: 5 × 6 = _

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Video Transcript

Notice how each row is six more than the previous one. One times six equals six. Two times six equals 12. Three times six equals 18. Find the result of the following: four times six equals what. And then also find the result of the following: five times six equals what.

Did you notice in this question we’ve got some six times table facts to find out? We need to find the answer to four times six and also five times six. But you know, in the first sentence, we’re given a clue that can help us. It’s pointed out to us that each row is six more than the previous one. And can you see what the rows are that this is talking about? It’s these rows of cubes. And if we look at each cube, we can see it has the number six on it. We could think of it as a dice that shows the number six.

So, what does it mean that each row is six more than the previous one? Well, our first row of cubes just shows one cube with a six on it. But our second row shows the one from before and then a new cube. In other words, it shows six more. And the next row shows the two from before. But again, one new cube, so six more. And knowing that each multiple of six in the six times table is worth six more than the last one can help us. One time six is six, and six more than six is 12. So, we know two times six is 12. Six more than 12 is 18. So, we know three times six is 18.

And now, we need to find four times six. And If we look at our cubes, we could take our three cubes that we already know from the last fact and then add one more cube. Or, in other words, take three sixes, which are worth 18, and then add one more six. And we know that 18 plus six equals 24. That’s how we know four times six is 24.

Finally then, we need to find out what five sixes are. As we’ve just said, the four sixes from our last fact are worth 24. And if we find six more than 24, we get the answer 30. So, five times six must be worth 30.

We got each answer by finding six more than the last one. Four times six is 24 and five times six is 30.

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