🛒 Shopping Mystery
I can subtract a cost then find an unknown price.
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📖 Learn first
Take away the known cost first, then share what is left among the unknown items.
Example: 4 pencils at $x and a $20 notebook cost $100
- 100 − 20 = 80
- 4 × x = 80
- x = 80 ÷ 4 = $20
Questions get harder as you go. The last ones ask you to type the answer.
