One of the highlights was a 4th grade math class on fractions, including the concepts of denominator and the numerator.

其中一个亮点就在一节四年级数学课上教授数，包括和子概念。

So, again, we're talking about fractions - this is the numerator; this is the denominator.

所以，我们再次谈论数——这子； 这。

We want it with the hours on the top, on the numerator.

我们希望它小时数在顶部，在子上。

Uh how did delta x go from the first denominator to the second numerator?

呃, delta x 如何从第一个第二个子?

Where this denominator and the numerator are both written with a special prime counting function.

其中和子都用特殊素数计数函数编。

Is concerning the other element in the numerator basis Rule.

关于子基法则中其他元素。

The numerator tells us the number of pieces we're dealing with.

TIM：子告诉我们要处理件数。

This whole simplification, we're just simplifying the numerator.

这整个简，我们只在简子。

The sum is 38.80, so the numerator.

总和 38.80，所以子。

So you have n to the k in the numerator and you have n to the k in the denominator.

所以你有 n k 子，你有 n k 。

Anyway, to simplify a fraction, you first have to find the greatest common factor of the numerator and the denominator.

无论如何，要简数，您首先必须找子和最大公因数。

Now, to simplify it, we can multiply both the numerator and the denominator by the mean of the x's.

现在，为了简它，我们可以将子和都乘以 x 平均值。

So we have 642 in the numerator.

所以子中有 642。

We replace the y in the first  numerator with position or " x" , because that is what is on the y-axis.

我们将第一个子中 y 替换为位置或“x” ，因为这 y 轴上内容。

Now, if we multiply our denominator by a number slightly larger than 3, we must also multiply our numerator by a number slightly larger than 3.

如果乘以一个略大于 3 数，那么子也必须乘以一个略大于 3 数。

So let me get the calculator out, and we have-- I'll do the numerator first.

所以让我拿出计算器，然后我们——我先算子。

This right here is the numerator when we were trying to figure out the slope of the regression line.

这就我们试图计算回归线斜率时子。

For example, calculations of return on capital look more impressive with an inflated numerator (present returns) and the denominator (capital invested in the past) in old dollars.

例如，在子(现在回报)涨高，而(过去投资资本)按旧美元来计价情况下，资本回报率计算看起来会更令人印象深刻。

The numerator over here is a 0.08.

这里子 0.08。

You're just multiplying the numerator and denominator by negative 1, which is same thing as multiplying the whole thing by 1.

您只将子和乘以负数 1，这与将整个事物乘以 1 一样。