Claire is saving up to buy a new laptop that costs $849. She has $232 and is saving $28 each week. How many full weeks will it take for her to save enough money to buy the laptop? Explain your reasoning using words and numbers.

Subtract the amount she has saved from the price of the laptop:

849 - 232 = 617

Now divide the amount she still needs by the amount she saves per week:

617 / 28 = 22.04

Because the answer has a number to the right of the decimal, she will need to save for 23 full weeks to have enough money.

If she saves for 22 weeks, she would be $1 short:

22 x 28 = 616 + 232 = 848