Regrouping and Estimating Sums: Fun Math Adventures!

Lily has 27 apples and she buys 15 more. How many apples does she have now? Use a number line to help you add.

• 50

• 35

• 30

• 42

Tom has 34 marbles and finds 29 more in his bag. How many marbles does Tom have altogether? Estimate the sum by rounding.

• 50

• 40

• 63

• 70

A farmer has 48 chickens and he buys 26 more. How many chickens does he have in total? Show your work on a number line.

• 64

• 80

• 50

• 74

Sarah read 56 pages of her book and then read 37 more. How many pages did she read altogether? Round to estimate the total.

• 90 pages

• 100 pages

• 70 pages

• 80 pages

In a toy store, there are 65 teddy bears and 28 dolls. How many toys are there in total? Use a number line to find the answer.

• 100

• 70

• 93

• 85

A baker made 73 cookies and sold 29 of them. How many cookies does he have left? Estimate the number of cookies remaining by rounding.

• 50

• 44

• 40

• 30

At the library, there are 82 fiction books and 39 non-fiction books. How many books are there in total? Use a number line to add.

• 95

• 100

• 121

• 130

Emma collected 45 stickers and her friend gave her 38 more. How many stickers does Emma have now? Round to estimate the total number of stickers.

• 100

• 90

• 70

• 80

A zoo has 54 lions and 27 tigers. How many big cats are there in total? Use a number line to help you add the numbers.

• 81

• 90

• 60

• 70

In a classroom, there are 36 boys and 29 girls. How many students are there in total? Estimate the total by rounding the numbers.

• 80

• 65

• 70

• 75