Three-Digit Place Value — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each number by whether it ends in zero.
Ends in 0
230560700 Does not end in 0
345412189 A number ends in zero only when the ones digit is 0, no matter how big the hundreds and tens are.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Skip count by 100: 134, 234, 334, 434.
334 plus 100 equals 434, since the tens and ones stay the same and the hundreds grow by 1.
2. Skip count by 100: 250, 350, 450, 550.
250 plus 100 equals 350, keeping 5 tens and 0 ones while hundreds jump from 2 to 3.
3. Skip count by 100: 107, 207, 307, 407.
307 plus 100 equals 407, since the tens digit stays 0 and the ones digit stays 7.
4. Skip count by 100: 520, 620, 720, 820.
620 plus 100 equals 720, with tens and ones unchanged at 20.
5. Skip count by 100: 189, 289, 389, 489.
289 minus 100 equals 189, since removing a hundred lowers only the hundreds digit.
Part C: True or False?
Read each statement. Circle True or False.
1. When you skip count by 100 from 312, the next number is 412.
True False
312 plus 100 equals 412 because only the hundreds digit grows from 3 to 4.
2. Skip counting by 100 from 450 gives 460 as the next number.
True False
Adding 100 to 450 gives 550, not 460, because 460 is only 10 more than 450.
3. Skip counting by 100 changes only the hundreds digit each step.
True False
Adding 100 leaves the tens and ones untouched, so only the hundreds digit changes each jump.
4. The number 100 less than 605 is 505.
True False
605 minus 100 equals 505, since the hundreds drop from 6 to 5 while tens and ones stay the same.