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Shelley was playing her favorite video game. Her character started with $100$ health points, but lost $11$ when she got in a fight. She lost $12$ more health points when a monster attacked her. Luckily, a healing spell gave her $21$ health points back. $\newline$ Shelley works out that she now has $98$ health points. Does that sound about right? $\newline$ Choices: $\newline$ (A)Yes. $\newline$ (B)No, it is much too high. $\newline$ (C)No, it is much too low.

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Add and subtract integers: word problems

Full solution

Q. Shelley was playing her favorite video game. Her character started with

100

health points, but lost

11

when she got in a fight. She lost

12

more health points when a monster attacked her. Luckily, a healing spell gave her

21

health points back.

\newline

Shelley works out that she now has

98

health points. Does that sound about right?

\newline

Choices:

\newline

(A)Yes.

\newline

(B)No, it is much too high.

\newline

(C)No, it is much too low.

Start with $100$ health: Shelley starts with $100$ health points. She then loses $11$ points in a fight, so we subtract $11$ from $100$ .
Lose $11$ points: After losing $11$ points, Shelley has $89$ health points left. She loses another $12$ points due to a monster attack. We subtract $12$ from $89$ .
Remaining $89$ health: Post monster attack, Shelley has $77$ health points. She then gains $21$ points from a healing spell. We add $21$ to $77$ .

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