Topic 8 Practice Test

What is the missing number?
62 + (38 +______) = (62 + 38) + 14

• 12

• 14

• 38

• 62

Tags

CCSS.7.NS.A.1D

A young leopard in a zoo weighs 283 pounds. Its sister weighs 349 pounds.

Choose all the equations that show a reasonable estimate for their total weight.

• 280 + 350 = 630

• 300 + 300 = 600

• 200 + 500 = 700

• 275 + 350 = 625

Round to the nearest ten to estimate the difference of

874 – 533.

• 430

• 500

• 340

• 240

Paul wants to use mental math to add 612 and 315.

Which of these shows how to break apart the numbers into hundreds, tens, and ones?

• Break 612 into 600 +10 + 2.

  Break 315 into 300 +15

• Break 612 into 600 +12.

  Break 315 into 300 +14 + 1

• Break 612 into 600 +10 + 2.

  Break 315 into 300 +15

• Break 612 into 600 +10 + 2.

  Break 315 into 300 +10 + 5

Tags

CCSS.2.NBT.B.7

Perry subtracted 62 from 217. His work is shown below.

217 – 62 = 155

Does the strategy below show a way to check his work using inverse operations?

155 + 62 = 217

• Yes

• No

Choose all the equations that are true.

• 0 + 445 = 0

• (127 + 75) + 250 = 127 + (75 + 250)

• 130 + 215 = 210 + 130

• 287 + 0 = 287

Tags

CCSS.1.OA.B.3

Bob wants to round to the nearest hundred to estimate the sum of 382 and 571.

He wrote 380 + 570 = 950.

What was his mistake?

• Bob rounded to the nearest 10

• Bob rounded to the nearest 100

• Bob rounded to the nearest 1000

• Bob didn't round

What is the sum of 370 and 580 rounded to the nearest hundred?

• 700

• 900

• 800

• 1,000

Carrie subtracts 362 from 662 and gets 300. What addition equation can she use to check her answer?

• 662 + 300 = 362

• 662 + 362 = 300

• 300 + 362 = 662

• 362 + 362 = 662

Round 648 to the nearest ten

• 640

• 650

• 600

• 660

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3