One-Step Equations: Reasonableness & Inverse Operations

Maria has 12 apples. She gives some apples to her friend and now has 8 apples left. How many apples did she give away?

• 6

• 4

• 10

• 2

A book costs $15. If you have $x, how much more money do you need to buy the book if you currently have $10?

• 3

• 7

• 5

• 10

Tom has 5 more than twice the number of marbles that Jerry has. If Jerry has x marbles, write an equation to find how many marbles Tom has.

• T = 2x - 5

• T = 2x + 5

• T = 3x + 5

• T = x + 5

A box contains 20 chocolates. If you eat x chocolates, how many chocolates are left in the box?

• 20 + x

• 20 - x

• 20 - 20 + x

• x chocolates

Lily is 3 years older than her brother. If her brother is x years old, how old is Lily?

• Lily is x years old.

• Lily is x + 3 years old.

• Lily is x + 5 years old.

• Lily is x + 1 years old.

A car travels 60 miles in 1 hour. How far will it travel in x hours?

• 60x miles

• 120 miles

• 60x + 10 miles

• 30x miles

The total cost of 4 notebooks is $20. How much does each notebook cost?

• Each notebook costs $4.

• Each notebook costs $3.50.

• Each notebook costs $6.

• Each notebook costs $5.

A gardener plants x flowers in each row. If there are 5 rows, how many flowers are planted in total?

• 25x

• 10x

• x+5

• 5x

A pizza is cut into 8 slices. If you eat x slices, how many slices are left?

• 8 + x

• x slices

• 8 - 8 + x

• 8 - x

A movie ticket costs $12. If you have $x, how many tickets can you buy?

• x / 12

• 12 - x

• x + 12

• x * 12