Addition and Subtraction Within 100 to Solve Word Problems with the Unknown Number

Sara has 23 marbles, and she buys 15 more from the store. How many marbles does Sara have now?

• 38

• 40

• 35

• 28

If there are 45 apples in a basket and John eats 12, how many apples are left in the basket?

• 33

• 57

• 23

• 37

A baker made 64 cupcakes for a party. If 26 cupcakes were eaten during the party, how many cupcakes are left?

• 38

• 40

• 42

• 36

Lily collected 48 seashells at the beach. She gave 16 of them to her friend. How many seashells does Lily have now?

• 32

• 34

• 30

• 28

A school had 75 textbooks in the library. They bought 20 more textbooks. How many textbooks are there in the library now?

• 95

• 55

• 90

• 85

During a game, Emma scored 28 points in the first half and 35 points in the second half. What is the total number of points she scored?

• 63

• 65

• 60

• 70

A farmer harvested 82 kilograms of potatoes. He sold 37 kilograms. How many kilograms of potatoes does he have left?

• 45

• 47

• 50

• 55

In a classroom, there are 18 boys and 24 girls. How many students are there in total in the classroom?

• 42

• 40

• 44

• 46

A train travels 30 miles north and then 15 miles south. How far is the train from its starting point?

• 15 miles

• 45 miles

• 25 miles

• 20 miles

If a store has 58 chairs and they sell 29, how many chairs does the store have left?

• 29

• 31

• 27

• 33