Creating Equations: Explore Variables in Math

1. Sarah has a number of apples, represented by the variable x. If she buys 5 more apples, how can you express the total number of apples she has now?

• 5 + x

• x + 5

• x + 10

• x - 5

2. A book costs y dollars. If you buy 3 books, how can you write an equation to find the total cost?

• total cost = 3 - y

• total cost = y + 3

• total cost = y / 3

• total cost = 3 * y

3. Tom has m marbles. If he gives away 8 marbles, how can you express the number of marbles he has left?

• m - 8

• m / 8

• m + 8

• m - 5

4. A car travels p miles per hour. How would you express the distance traveled in t hours?

• p / t miles

• p * t miles

• p - t miles

• p + t miles

5. Lisa has n stickers. If she receives 10 more stickers from her friend, how can you write an equation for the total number of stickers she has?

• n - 10

• n + 5

• n * 10

• n + 10

6. A rectangle has a length of l meters and a width of 4 meters. How can you express the perimeter of the rectangle in terms of l?

• P = 2 * (l - 4) meters

• P = 2 * (l + 4) meters

• P = l + 4 meters

• P = 4 * l meters

7. If the temperature is t degrees and it increases by 15 degrees, how can you express the new temperature?

• t + 15

• t + 30

• t * 15

• t - 15

8. A box contains b balls. If 3 boxes are filled, how can you express the total number of balls in all the boxes?

• 3b

• b

• 9b

• 6b

9. If a pizza has s slices and you eat 2 slices, how can you express the number of slices left?

• s + 2

• s - 1

• s / 2

• s - 2

10. A school has c classrooms. If each classroom has 25 students, how can you write an equation to find the total number of students in the school?

• total_students = 25 + c

• total_students = c - 25

• total_students = c * 25

• total_students = c / 25