Hundreds, tens and ones · sheet 23 of 30
Answer key
The answer, and what a wrong answer means.
| # | Problem | Answer | If they wrote… |
|---|---|---|---|
| 1 | 7 hundreds, 12 tens, 2 ones | 822 | 7122 the unit never changes when you regroup |
| 2 | 3 hundreds, 12 tens, 0 ones | 420 | 3120 the unit never changes when you regroup |
| 3 | 4 hundreds, 11 tens, 0 ones | 510 | 4110 the unit never changes when you regroup |
| 4 | 8 hundreds, 7 tens, 0 ones | 870 | 15 a digit's value is its face value |
| 5 | 7 hundreds, 3 tens, 1 one | 731 | 11 a digit's value is its face value |
| 6 | 8 hundreds, 14 tens, 7 ones | 947 | 8147 the unit never changes when you regroup |
| 7 | 3 hundreds, 9 tens, 0 ones | 390 | 12 a digit's value is its face value |
| 8 | 3 hundreds, 0 tens, 5 ones | 305 | 8 a digit's value is its face value |
| 9 | 8 hundreds, 9 tens, 3 ones | 893 | 20 a digit's value is its face value |
| 10 | 7 hundreds, 11 tens, 9 ones | 819 | 7119 the unit never changes when you regroup |
| 11 | 7 hundreds, 7 tens, 8 ones | 778 | 22 a digit's value is its face value |
| 12 | 6 hundreds, 2 tens, 2 ones | 622 | 10 a digit's value is its face value |
| 13 | 1 hundred, 4 tens, 3 ones | 143 | 8 a digit's value is its face value |
| 14 | 7 hundreds, 14 tens, 4 ones | 844 | 7144 the unit never changes when you regroup |
| 15 | 8 hundreds, 4 tens, 2 ones | 842 | 14 a digit's value is its face value |
| 16 | 2 hundreds, 0 tens, 1 one | 201 | 3 a digit's value is its face value |
| 17 | 9 hundreds, 2 tens, 0 ones | 920 | 11 a digit's value is its face value |
| 18 | 6 hundreds, 0 tens, 7 ones | 607 | 13 a digit's value is its face value |
| 19 | 4 hundreds, 1 ten, 0 ones | 410 | 5 a digit's value is its face value |
| 20 | 9 hundreds, 0 tens, 3 ones | 903 | 12 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.