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Comparing three-digit numbers

1. Can you tell which number is more? Try! Write  <  or  >  between the numbers.

a.

   

 

 
 

 145

 

154

b.

   

 

 

 234

324

c.

   

 

 189

 

302

d.

  

 

 

 513

315

 

Learn the new symbols:

  = 100,   = 10, and    = 1.

   

 =   

124

  =   

240

2. Draw the symbols ,   , and    for the numbers. Then compare and write  <  or  > .

 a.  120

130

 b.  240

420

 c.  305

503

 d.  453

534



To compare three-digit numbers:
  1. First check if one number has more  hundreds  than the other.
    For example, 652 < 701, because 701 has more hundreds than 652.

  2. If the numbers have the same amount of hundreds, then check the  tens .
    For example, 652 > 639 because though both have six hundreds, 652 has
    more tens than 639.

  3. If the numbers have the same amount of hundreds AND the same amount 
    of tens, then look at the  ones . For example, 652 < 655 because though
    both have six hundreds and five tens, 655 has more  ones .

Remember, the open end (open mouth) of the symbols < and > ALWAYS 
opens towards the bigger number.

3. Find the biggest number in each set!

a.  259,  592,  295 b.  470,  774,  747 c.  409,  944,  949 d.  506,  605,  505
e.  911,  119,  191 f.  482,  382,  284 g.  334,  433,  403 h.  208,  820,  802

4. Write either < or > in between the numbers.

a.  159   <  300 b.  122       100 c.  320      328 d.  212      284
e.  200      190 f.  600      860 g.  456      465 h.  711      599
i.  780      500 j.  107      700 k.  566      850 l.  840      480

5. Arrange the three numbers in order.

a.  140, 156, 149

140  <  149  <  156

b.  357, 573, 750

 

c.  239, 286, 133


 

d.  670, 766, 676

 



6. Mark the numbers on the number line: 513, 530, 489, 468, 596, 606, 560, 466, 506, 516

 
7. Find a number to write on the empty line. There are many possibilities!

    a.  140 < _________ < 149

    c.  279 < _________ < 290

b.  267 < _________ < 804

d.  304 < _________ < 310

8. Find your way through the maze! The rules are: you can move either left, right, or
    down, provided that the number following is BIGGER than the number in the
    square you are in.

100 121 127 133 167 189 200 214 212 398
145 166 134 135 120 230 212 256 347 405
156 167 137 156 155 226 356 378 380 407
632 234 138 246 267 278 476 477 450 417
432 256 200 250 245 300 355 487 478 456
355 253 289 244 305 303 570 569 490 453
361 385 377 367 356 301 537 566 505 498
689 654 390 480 478 488 675 507 508 689
654 543 489 488 483 577 589 609 504 769
723 566 570 589 578 734 631 616 789 1000


This lesson is taken from Maria Miller's book Math Mammoth Place Value 2, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.


Math Mammoth Place Value 2

A self-teaching worktext for 2nd grade that covers hundreds, tens, and ones (three-digit numbers), number charts, skip-counting, comparing, and rounding.

Download $2.25 or Pay What You Want!
Also available as a printed copy.

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