Unit 1 Review

Place Value

100

What digit is in the tens place in the following number 45,291? 

9

200

What is the value of the underlined digit? 

201,292

1,000

300

What is the value of 12 tens? 

120

400

What is the value of 23 hundreds and 48 ones altogether?

2,348

500

Write the following number using ONLY hundreds, tens, and ones, TWO different ways. 

15,497

Possible Options: 

154 hundreds + 9 tens + 7 ones

1,549 tens + 7 ones

15,497 ones

Comparing

100

Which end of the >, and < signs face the larger number when comparing? 

The open end

200

Using >, < or =, compare the following two numbers: 23,210 and 32,939

23,210 > 32,939

32,939 < 23,210

300

Which place value helps us compare 12,383 and 12,432? 

The hundreds place

400

Which is less: 493,219 or 492,319? 

492,319

500

Write a comparison using >, < or = to compare the following numbers in standard form. 

90,000 + 2,000 + 400 + 50 + 1

and

90,000 + 1,000 + 600 + 80 + 9

92,451 > 91,689

or

91,689 < 92,451

Rounding

100

What is 4,201 rounded to the nearest thousand? 

4,000

200

What is 23,049 rounded to the nearest ten? 

23,050

300

What is 984,101 rounded to the nearest ten thousand? 

980,000

400

There are 6,949 animals in a forest preserve. Mike and Jane both round this number to different places. Mike rounds to 7,000 and Jane rounds to 6,950. What places did Mike and Jane round to? 

Mike rounds to the nearest thousand and Jane rounds to the nearest 10. 

500

Cindy says that 93,291 rounded to the nearest ten thousand is 100,000. What mistake did she make? What should she round to? 

Cindy did 5 or more raise the score, but looked at the wrong digit. The thousands place has a 3, so it would actually be 90,000. 

Adding

100

What does "sum" mean? 

The answer to an addition problem

200

Find the sum 20,932 and 54,381

75,313

300

Find the sum of 391,853 and 292,180

684,033

400

Last year Susie sold 64,191 toys and this year she sold 78,281. How many toys did she sell in all?

Susie sold 142,472 toys.

500

Find the sum of 129,382 and 942,173 AND check your answer using estimation.

1,071,555

Subtracting

100

What does "difference" mean? 

The answer to a subtraction problem. 

200

Find the difference of 32,812 and 14,593

18,219

300

Find the difference of 850,281 and 432,902

417,379

400

Kelly and Tina are having a contest to see who can read more book pages. Kelly reads 1,928 pages and Tina reads 1,203 pages. How many more pages did Kelly read than Tina? 

Kelly read 725 more pages. 

500

Find the difference of 383,930 and 18,203 AND check your answer using either estimation OR addition. 

365,727