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

Tags

CCSS.2.NBT.B.5

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

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

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

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

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

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

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

Tags

CCSS.2.NBT.B.5

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

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

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

Tags

CCSS.2.NBT.B.7