What this lesson shows
96 cookies, 21 students, 12 kept: 21 × n + 12 = 96, so n = 4.
The worked example
The lesson works this one step by step: 21 × n + 12 = 96. Then your kid tries one like it on paper.
The steps
- Call it n
- Write the equation
- Undo, then check
Helping at home
Call the unknown n and write the story as an equation: groups × n + kept = total. Solve by undoing the steps: take away what was kept, then divide by the groups. Check by putting n back in.
If your kid gets stuck
Call the unknown n. Write the story as an equation.
Watch it with Lux
With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.