章节大纲

  • Hi everyone. Today we're going to do some multiplication problems that involve choosing the multiples of a given number up to 12. Let's take a look at this example. Which of the following numbers are multiples of 12? Multiple means that when I multiply a number by 12, 12 times 1, let's say, and that equals 12, 12 is a multiple of 12. And we can do that with 12 times 2, which is going to give us 24 and 12 times 3, which is going to give us 36 and 12, 24, and 36 then are multiples of 12. Let's take a look at these answer choices that we have here. 22, 134, 134, and 35. So we have all these choices here. Let's take a look and see if any of them give us multiples of 12. 22, we can see is not a multiple of 12, because 12 times 1 is 12 and then 12 times 2 is 24. We could maybe get 22, but we would have to use a number that's not a whole number, which makes it not a multiple of 12. So 22 is off our list. 134, there is not a number that we can multiply by 12 to get 134. So the whole number, so 134, is in a multiple of 12. So here we have 24 and 35 left. So 24, we can obviously see is a multiple of 12, because we did 12 times 2 and we got 24. So yeah, we found one. 24. Let's check this last one. 35. Notice that 12 times 3 is 36, so we can't really get 35 by multiplying a number 12 times a whole number. So that must mean, again, 35 is not a multiple of 12.
    大家好。今天我们将做一些乘法题,其中涉及选择给定数字的12以内倍数。让我们看一下这个例子。以下哪个数字是12的倍数?倍数意味着当我用12乘以一个数字时,比如12乘以1,结果等于12,那么12就是12的倍数。我们可以用12乘以2,得到24,12乘以3,得到36,那么12、24和36就是12的倍数。让我们看一下这里的这些答案选项。22、134和35。我们有这些选项。让我们看看它们中是否有12的倍数。22,我们可以看到它不是12的倍数,因为12乘以1是12,12乘以2是24。我们也许可以得到22,但我们必须使用一个非整数,这使得它不是12的倍数。所以22从我们的列表中排除。134,我们找不到一个整数乘以12等于134。所以134不是12的倍数。所以这里我们剩下24和35。24,我们显然可以看到它是12的倍数,因为我们计算了12乘以2,得到了24。所以,我们找到了一个。24。让我们检查最后一个。35。注意,12乘以3是36,所以我们无法通过用整数乘以12得到35。所以这意味着,35也不是12的倍数。