2nd Grade Math: Estimating and Using Number Lines

Lily has 27 apples. She gives 15 apples to her friend. How many apples does she have left? Use a number line to help you.

• 20

• 15

• 10

• 12

Tags

CCSS.7.NS.A.1C

Tom has 45 marbles. He buys 28 more marbles. How many marbles does he have now? Estimate the total before calculating.

• 80

• 73

• 50

• 65

Tags

CCSS.2.NBT.B.6

A farmer has 56 carrots. He sells 29 carrots at the market. How many carrots does he have left? Show your work on a number line.

• 27

• 35

• 30

• 25

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Sarah read 34 pages of her book. Then she read 19 more pages. How many pages did she read in total? Estimate first, then find the exact number.

• 55

• 50

• 52

• 53

Tags

CCSS.7.NS.A.1C

In a box, there are 63 chocolates. If 27 chocolates are eaten, how many chocolates remain? Use a number line to find the answer.

• 45

• 50

• 27

• 36

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

A toy store had 78 toys. They sold 45 toys during a sale. How many toys are left in the store? Estimate the difference before solving.

• 50

• 25

• 33

• 40

Ben collected 52 stickers. He gave 18 stickers to his friend. How many stickers does he have now? Use a number line to show your work.

• 34

• 50

• 40

• 30

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Emma has 90 balloons. She pops 37 balloons during a party. How many balloons are left? Estimate the number before calculating the exact amount.

• 75

• 60

• 47

• 53

A library has 120 books. If 45 books are checked out, how many books are still in the library? Use a number line to help you find the answer.

• 65

• 80

• 90

• 75

Tags

CCSS.2.NBT.B.7

Jack has 75 toy cars. He loses 29 of them. How many toy cars does he have left? Estimate the difference and then calculate the exact number.

• 70

• 46

• 60

• 50