Adding and Estimating with Number Lines: Grade 3 Fun!

Lily has 12 apples and she buys 8 more. How many apples does she have now? Use a number line to help you add.

• 20

• 25

• 18

• 15

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Tom has 15 marbles, and he finds 7 more marbles in his bag. Estimate how many marbles Tom has in total.

• 20

• 25

• 18

• 22

A farmer has 20 chickens and buys 5 more. How many chickens does he have altogether? Use a number line to find the answer.

• 30

• 25

• 20

• 15

Tags

CCSS.2.OA.A.1

Sarah read 18 pages of her book on Monday and 14 pages on Tuesday. How many pages did she read in total? Estimate the sum.

• 40 pages

• 32 pages

• 25 pages

• 30 pages

Tags

CCSS.2.OA.A.1

In a classroom, there are 22 students. If 9 more students join, how many students are there now? Use a number line to solve.

• 31

• 29

• 30

• 22

Tags

CCSS.1.OA.A.1

A toy store has 30 toy cars and receives a shipment of 15 more. How many toy cars are there now? Estimate the total number of toy cars.

• 45

• 25

• 50

• 30

Emma has 25 stickers, and she gives 10 to her friend. How many stickers does she have left? Use a number line to find the answer.

• 5

• 20

• 15

• 10

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

At the park, there are 16 swings and 9 slides. How many total play equipment items are there? Estimate the sum to check your answer.

• 30

• 20

• 24

• 25

Tags

CCSS.2.OA.A.1

A bakery made 40 cookies in the morning and 25 cookies in the afternoon. How many cookies did they make in total? Use a number line to help you add.

• 65

• 50

• 60

• 70

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Jake has 50 baseball cards, and he trades 15 with his friend. How many baseball cards does he have now? Estimate the total after the trade.

• 25

• 45

• 50

• 35