Solve Math Word Problems: Identify & Evaluate Variables

1. Sarah has x apples. If she buys 5 more apples, how many apples does she have now? Write the equation and identify the variable.

• x - 5

• x + 5

• 5x

• x + 10

2. A book costs $y. If you buy 3 books, how much do you spend? Write the expression and evaluate it if y = 10.

• 25

• 15

• 20

• 30

3. Tom has 12 marbles. He gives away m marbles to his friend. Write an equation to show how many marbles he has left and identify the variable.

• 12 * m

• 12 + m

• m - 12

• 12 - m

4. A box can hold n toys. If you have 4 boxes, how many toys can you store? Write the expression and evaluate it if n = 6.

• 24

• 18

• 20

• 30

5. Lisa is x years old. In 5 years, she will be 3 times her current age. Write an equation to find x and solve it.

• 10

• 1.5

• 2.5

• 5

6. A car travels d miles in 1 hour. How far will it travel in 4 hours? Write the expression and evaluate it if d = 60.

• 240 miles

• 120 miles

• 300 miles

• 180 miles

7. There are p pencils in a box. If you take away 7 pencils, how many are left? Write the equation and identify the variable.

• p + 7

• p - 5

• p - 7

• p / 7

8. A pizza is cut into s slices. If you eat 2 slices, how many slices are left? Write the expression and evaluate it if s = 8.

• 10

• 6

• 8

• 4

9. A farmer has 20 apples and he wants to divide them equally among b baskets. Write the equation to find out how many apples each basket will get and identify the variable.

• apples_per_basket = b - 20

• apples_per_basket = 20 / b, where b is the number of baskets.

• apples_per_basket = 20 + b

• apples_per_basket = 20 * b

10. If a train travels at a speed of r miles per hour, how far will it travel in 3 hours? Write the expression and evaluate it if r = 50.

• 180 miles

• 120 miles

• 200 miles

• 150 miles