Lesson 1: Write Equations6.AT.8

I can…

I can write an equation to represent a real-world situation.

Key words

• Equation — A math sentence with an equal sign showing both sides are the same.
• Variable — A letter that stands for a number that is unknown or can change.
• Equal sign — The = sign, showing both sides are the same.
• Expression — A math phrase with numbers and letters, but no equal sign.

Steps

1. Clue: 'A number of stolen gems plus 8 more equals 20 total.'
2. The unknown is the number of gems. I let n stand for it.
3. 'Plus 8 more' means + 8. 'Equals 20 total' means = 20.
4. So my equation is n + 8 = 20.

Try it

Which equation represents: 'A number divided by 6 equals 9'?

Check your answer

n / 6 = 9

'Divided by 6' means division: n / 6 = 9. Check: 54 / 6 = 9 ✓

Sentence starter

I know ___ because ___.

Goal: I can explain my equation using the words equation, variable, equal sign, and expression.