Unit 3 Math Test Review

Word Problems & PV

100

Draw a Place Value Drawing for the number

653

Refer to the board

200

Draw a Place Value Drawing for the number

7852

Refer to the board

300

A museum has 578 flowers and 342 butterflies. Round each number to the nearest ten and then estimate how many more flowers the museum has than butterflies.

First, we round 578 to the nearest ten. Since the units digit is 8, which is 5 or more, we round up. So 578 becomes 580.

Next, we round 342 to the nearest ten. The units digit is 2, which is less than 5, so we round down. So 342 becomes 340.

Now, to estimate how many more flowers there are than butterflies, we subtract the rounded butterfly count from the rounded flower count: 580 minus 340 equals 240.

So, the estimated difference is about 240 more flowers than butterflies.

400

A book store sells 780 items in one week. The store sells 325 fiction books and 189 nonfiction books. The rest of the items are magazines.

How many magazines does the store sell?

Let’s solve it:

• Total items: 780

• Fiction books: 325

• Nonfiction books: 189

First, add the books:
325 + 189 = 514

Now subtract from the total:
780 − 514 = 266

✅ The store sells 266 magazines.

500

A movie store sell 645 movies and cds. The store sells 300 horror movies and 124 comedy movies. The rest are CDS. How many CDs does the store sell?

Let’s break it down step by step:

• Total items sold: 645

• Horror movies: 300

• Comedy movies: 124

First, find the total number of movies:
300 + 124 = 424 movies

Now subtract the movies from the total to find the number of CDs:
645 − 424 = 221

✅ The store sells 221 CDs.

Add

100

Add & Pick a Method (New Group Above, Below, Show ALL Totals)

392 + 174

566

200

Solve: 654 + 256 =

Write the answer in word form!!

654 + 256 = 910

Now write it in word form:

✅ nine hundred ten

300

Solve:
487 + 325 = ______ 

Draw a Place Value Drawing! 

Let’s solve it:

487 + 325 = 812

Written in word form:

✅ eight hundred twelve

400

Solve: 646 + 9334 = 

Then round to the nearest hundred

First, solve the problem: 9980

Now, round to the nearest hundred:

• 9,980 is closer to 10,000 than 9,900

Rounded answer: 10,000

500

Solve: 895 + 75 

Write the answer in word form, expanded, and place value drawing 

970

nine hundred ninety five

900+70

Draw 

Subtract

100

Katie saves 567 pennies for her bank... If Katie gives 50 pennies away and spends 125 pennies he will have 325 pennies  

True or False

False.

Here’s why:
Katie starts with 567 pennies.
She gives away 50 and spends 125.

She would have 392 pennies, not 325.

200

Choose the difference that completes the number sentence:

833-266 = 

597, 366, 567, 566

567

300

800 - 257 =

Use the minus one trick and draw a proof drawing (bonus points = 100)

543

400

Solve: 523- 278

Then explain did you ungroup to subtract? Explain why or why not?

Solution:
523 − 278 = 245

Explanation:
Yes, you did need to ungroup (borrow) to subtract. When subtracting, the top digit in the ones place (3) was smaller than the bottom digit (8), so borrowing was necessary. After borrowing, the tens place also required borrowing because the top digit became smaller than the bottom digit there as well. Ungrouping allowed each subtraction step to be completed correctly.

500

Write a subtraction word problem that relates to this.. Anna has 65 blue cups and 54 red cups how many cup does she have in all?

Part A: Solve the Addition 

Part B: Write a Subtraction Word Problem

Answers Will Vary

Proof Drawings

100

Make a Proof Drawing to Provide You Answer is Correct..

50 - 26 =

24

200

Make a Proof Drawing to Provide You Answer is Correct..

310 - 45 =

265

300

Make a Proof Drawing to Provide You Answer is Correct..

245 + 786

1,031

400

Make a Proof Drawing to Provide You Answer is Correct..

367 + 687 =

1,054

500

Make a Proof Drawing to Provide You Answer is Correct..

5010 + 621

5,631

Random

100

Use rounding to decide whether this answer is reasonable or not

672 − 318 = 254

NOT reasonable ❌

200

Write 6,292 in expanded form

6000 + 200 + 90 + 2

300

Use rounding to decide whether this answer is reasonable or not

651 − 312 = 339
 

Round: 650 − 310 ≈ 340 Reasonable ✅

 

400

Abby has 200 squishmellows. She gives 53 of them to her sister. Then, her cousin gives her 68, Abby says she has now has 400 squishmellows. Is her answer reasonable? 

Find the actual answer to see if she is correct.

• Abby starts with 200 squishmellows

• She gives away 53:
  200−53=147200 - 53 = 147200−53=147

• Her cousin gives her 68 more:
  147+68=215147 + 68 = 215147+68=215

Actual answer: 215 squishmellows

Since 215 is much less than 400, Abby’s answer is not correct.

500

Alex has 300 trading cards. He gives 80 of them to his friend and then his neighbor gives him 150 trading cards. Alex claims he now has 370 trading cards. EXPLAIN

Is Alex’s answer reasonable?

Bonus points (Check to see if answer is correct) 100

The answer is yes!