Question

Lisa’s scores for 3 video games were 245, 672, and 437. What would she have to score in the next game to tie her friend Anne’s average score of 438? (Set up an equation and solve)

Answer 1

398

Explanation:

She will have to score exactly 398 to tie the score with Anne

Answer 2

298 points

Explanation:

First, I added 245, 672 and 437 for 1,454.

`245+672+437=1454`

Then, multiply 438 (Anne's average) by 4 for 1,752.

`4(438)=1752`

After that, subtract 1454 from 1752 for 298 points in game 4.

`1752-1454=298`

(A strategy for that you could use is subract the larger ending two digits from the smaller one, then subtract that from 100. Then subtract the front digits of the second number from the front digits of the first number minus one.

So here, 54 - 52 = 2

100 - 2 - 98, so that's the last two digits.

(17 - 1) - 14 = f

16 - 14 = 2 = f, so that's the front digit.