Unit 4 Review

Addition

100

245+378=

623

200

1,286 + 4,539=

5,825

300

12,457 + 8,964=

21,421

400

123,845+67,912= 

191,757

500

1,999,999 + 238,233

2,238,232

Subtraction

100

54-29

25

200

1,204 - 678 

526

300

23,405-9,877

13,528

400

1,002,013 - 487,594

514,419

500

1,000,000-276,887

723,113

Times 10

100

A baker bakes 8 loaves of bread each hour. How many loaves does the baker bake in 10 hours?

8x10=80

200

A school orders 34 boxes of pencils. Each box contains 10 pencils. How many pencils did the school order?

34x10=340

300

A factory produces 1,275 widgets per day. How many widgets does it produce in 10 days?

1,275 x 10 = 12,750

400

A charity packs 48,392 meal kits into pallets of 10 boxes each. How many meal kits are on 10 pallets?

48,392 x 10 =483,920

500

A data center stores 2,349,761 files per server. If the company deploys 10 identical servers, how many files can they store in total?

2,349,761 x 10 = 23,497,610

Surprise

100

Compare the decimals 

0.39 ___ 0.03

0.39 > 0.03

200

Compare 642,811 ___ 642,918 

642,811 < 642,918

300

Compare 234,031 ____ 47,340 

234,031  > 47,340

400

Select all representations of the number 47,300.

• A. Forty-seven thousand three hundred
• B. Four thousand seven hundred thirty
• C. 40,000 + 7,000 + 300
• D. 47,000 + 300
• E. 40,000 + 700 + 3,000

A,C,D

500

A county reported 524,378 residents in 2018. A neighboring county reported 768,214 residents in the same year. How many residents are there in total in both counties? 

1,292,592

Rounding

100

Round 346 to the nearest ten

350

200

Round 1,320 to the nearest hundred 

1,300 

300

Round 2,185 to the nearest hundred.

2,200

400

Round 47,639 to the nearest thousand

48,000

500

Round 246,751 to the hundred-thousand.

200,000