Estimating and Subtracting with 2-Digit Numbers

Lily has 34 apples and she buys 27 more. How many apples does she have now? Estimate the total before adding.

• 45

• 70

• 50

• 61

Tom has 56 marbles. He gives away 29 marbles to his friends. How many marbles does he have left? Use a number line to help you subtract.

• 25

• 30

• 40

• 27

A bakery made 45 cupcakes in the morning and 38 cupcakes in the afternoon. How many cupcakes did they make in total? Estimate the sum first.

• 75

• 83

• 90

• 100

Sarah read 23 pages of her book on Monday and 19 pages on Tuesday. How many pages did she read in total? Use a number line to find the answer.

• 42

• 45

• 40

• 38

In a toy store, there are 48 toy cars and 27 toy trucks. How many toys are there in total? Estimate the total number of toys first.

• 75

• 60

• 80

• 70

Jake has 72 stickers. He loses 15 stickers. How many stickers does he have now? Use a number line to help you find the answer.

• 45

• 57

• 72

• 60

A farmer has 65 chickens and buys 24 more. How many chickens does he have altogether? Estimate the sum before calculating.

• 75

• 100

• 80

• 89

Emma collected 50 seashells at the beach and gave 18 to her friend. How many seashells does she have left? Use a number line for subtraction.

• 32

• 22

• 40

• 28

There are 39 students in the art class and 22 students in the music class. How many students are there in total? Estimate the total number of students first.

• 61

• 70

• 58

• 65

A library has 84 books. If 29 books are checked out, how many books are left in the library? Use a number line to help you subtract.

• 45

• 70

• 55

• 60