Hundreds, tens and ones · sheet 30 of 30
Answer key
The answer, and what a wrong answer means.
| # | Problem | Answer | If they wrote… |
|---|---|---|---|
| 1 | 9 hundreds, 0 tens, 9 ones | 909 | 18 a digit's value is its face value |
| 2 | 2 hundreds, 7 tens, 2 ones | 272 | 11 a digit's value is its face value |
| 3 | 4 hundreds, 0 tens, 4 ones | 404 | 8 a digit's value is its face value |
| 4 | 3 hundreds, 14 tens, 6 ones | 446 | 3146 the unit never changes when you regroup |
| 5 | 5 hundreds, 10 tens, 0 ones | 600 | 5100 the unit never changes when you regroup |
| 6 | 5 hundreds, 0 tens, 7 ones | 507 | 12 a digit's value is its face value |
| 7 | 1 hundred, 3 tens, 6 ones | 136 | 10 a digit's value is its face value |
| 8 | 7 hundreds, 15 tens, 4 ones | 854 | 7154 the unit never changes when you regroup |
| 9 | 8 hundreds, 3 tens, 0 ones | 830 | 11 a digit's value is its face value |
| 10 | 2 hundreds, 2 tens, 2 ones | 222 | 6 a digit's value is its face value |
| 11 | 9 hundreds, 2 tens, 0 ones | 920 | 11 a digit's value is its face value |
| 12 | 1 hundred, 14 tens, 5 ones | 245 | 1145 the unit never changes when you regroup |
| 13 | 7 hundreds, 6 tens, 0 ones | 760 | 13 a digit's value is its face value |
| 14 | 3 hundreds, 14 tens, 2 ones | 442 | 3142 the unit never changes when you regroup |
| 15 | 8 hundreds, 10 tens, 9 ones | 909 | 8109 the unit never changes when you regroup |
| 16 | 5 hundreds, 4 tens, 0 ones | 540 | 9 a digit's value is its face value |
| 17 | 4 hundreds, 8 tens, 1 one | 481 | 13 a digit's value is its face value |
| 18 | 3 hundreds, 0 tens, 1 one | 301 | 4 a digit's value is its face value |
| 19 | 4 hundreds, 8 tens, 9 ones | 489 | 21 a digit's value is its face value |
| 20 | 9 hundreds, 4 tens, 5 ones | 945 | 18 a digit's value is its face value |
Reading the wrong answers
One wrong answer is a slip. The same pattern on three or more problems is a rule your child is following, and it has a name and a fix. Problems marked "no pattern to catch" are the plain ones; a child who gets only those right is telling you something too.