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### Course: 5th grade>Unit 13

Lesson 1: Writing expressions

# Constructing numerical expressions

Sometimes, we don't need to solve an equation right away. Instead, we can use the information in a given word problem to construct a numerical expression that represents the information. Created by Sal Khan.

## Want to join the conversation?

• There are no videos explaining the use of brackets? It can be quite confusing to anyone learning for the first time when they try to solve any problem that includes braces and parenthesis.
• brackets and perentheses are the same thing you just want to do the parentheses before the brackets like the teacher taught you parentheses first.
• I just lost my marbles trying to understand this. Pun intended. :)))) It's easy tho
• ngl who else be looking in the comments when their bored??
• i do
(1 vote)
• addition is an opperation so why did Sal say that he solved the problem without using operations even though he used addition?
• So, he didn't really use the operation. He just wrote down what they were asking for. If he had actually performed the operation, he would have come up with 27, which is a number, not a numerical expression.
Hope this helps.
• im the newest comment ever since 7 yrs ago
(1 vote)
• my mom makes me do a unit a day cause she thinks im good at math
• Thats good to know keep up the good work
• math is a good subject to learn kade.dean30
• no it is not.
• Hello, this is helpful thanks.