Unit 3 Review

Gael's book has 251 pages. Yeyson's book has 235 pages. What is the total number of pages in both books?

Solve on the open number line.

Write your answers in the blanks.

Andrea wants to add 35 + 21 + 25 + 19.

Which problem shows a way Andrea can find the sum?

• A) 50 + 30

• B) 40 + 60

• C) 30 + 60

• D) 50 + 40

Compare

Ryder has 234 trading cards. Max has 176 trading cards.

Which equations could be used to find how many trading cards Ryder and Max have in all?

Choose all the correct answers.

• A) 230 + 170 + 10 = ?

• B) 234 - ? = 156

• C) 234 - 176 = ?

• D) 300 + 10 + 10 = ?

• E) 300 + 100 + 10 = ?

How many trading cards do Ryder and Max have in all?

Show your work on your whiteboards.

Ryder and Max have _______ trading cards in all.

Skip-count to complete the number pattern.

Mayra wants to add these numbers.

21 + 27 + 33

She adds two numbers that make a tens number.

Then she finds a sum. How did Mayra get her answer?

Explain your thinking.

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There are 253 people on the beach.

Then 100 more people come to the beach.

How many people are on the beach now?

• A) 153

• B) 333

• C) 383

• D) 353

Kya is subtracting 484–356. Which tells how Kya should regroup and why?

• A) Kya needs to regroup 4 hundreds as 3 hundreds and

  10 tens in order to subtract 5 in the tens place.

• B) Kya needs to regroup 8 tens as 7 tens and 10 ones in

  order to subtract 6 in the ones place.

• C) Kya needs to regroup 8 tens as 7 tens and 1 one in

  order to subtract 6 in the ones place.

• D) Kya needs to regroup 4 hundreds as 3 hundreds and

  1 ten in order to subtract 5 in the tens place.

Gabe's grandmother lives 457 miles away.

How would Gabe write the number of miles in expanded form?

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