18 lines
706 B
Markdown
18 lines
706 B
Markdown
|
---
|
||
|
|
tags:
|
||
|
|
- Mathematics
|
||
|
|
- Prealgebra
|
||
|
|
---
|
||
|
|
|
||
|
|
## Grouping symbols
|
||
|
|
|
||
|
|
We use parentheses to delimit the part of an expression we want evaluated first. If grouping symbols are nested, evaluate the expression in the innermost pair of grouping symbols first,
|
||
|
|
|
||
|
|
## Writing mathematical statements: placement of $=$
|
||
|
|
|
||
|
|
We only write one equals sign per line. For example, if we are resolving parentheses:
|
||
|
|
|
||
|
|
$$ \begin{equation} \begin{split} 2 + \[3 + (4+5)\] = 2 + \[3 +9\] \\ = 2 + 12 \\ = 14 \end{split} \end{equation} $$
|
||
|
|
|
||
|
|
We call parentheses (`()`), brackets (`[]`) and braces `{}`) grouping symbols. When groupings (say parentheses) are used, the expression inside any pair of parentheses must be evaluated first.
|