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teaching:topics:algebra:first [2021/09/22 23:50] admin |
teaching:topics:algebra:first [2021/09/23 00:21] simon |
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<wrap #term>We write algebra a little differently compared to arithmetic.</wrap> We do not usually write the `times` or `div` symbols. We always use a fraction-bar instead of `div` and we write numbers and letters next to | <wrap #term>We write algebra a little differently compared to arithmetic.</wrap> We do not usually write the `times` or `div` symbols. We always use a fraction-bar instead of `div` and we write numbers and letters next to | ||
each other to mean multiplication, so that: | each other to mean multiplication, so that: | ||
- | |||
\begin{align*}%% | \begin{align*}%% | ||
- | 42ab \qquad\text{me}&\text{ans}\qquad 42 \times a \times b,\\ | + | \phantom{\frac12}42ab\ \ \text{means}\ \ &42 \times a \times b,\\ |
- | \text{an}&\text{d:}\\ | + | \text{and:}\ \ \ &\\ |
- | \frac{4x}{yz} \qquad\text{me}&\text{ans}\qquad (4 \times x)\div(y \times z). | + | \frac{4x}{yz}\ \ \text{means}\ \ &(4 \times x)\div(y \times z). |
%%\end{align*} | %%\end{align*} | ||
We call these groups of symbols a **term**. | We call these groups of symbols a **term**. |