Multi-digit multiplication · sheet 19 of 30
Answer key
The answer, and what a wrong answer means.
| # | Problem | Answer | If they wrote… |
|---|---|---|---|
| 1 | 22 × 5 | 110 | no pattern to catch here |
| 2 | 52 × 45 | 2340 | 2010 leaving out a partial product468 forgetting to shift the second row |
| 3 | 31 × 2 | 62 | no pattern to catch here |
| 4 | 82 × 9 | 738 | no pattern to catch here |
| 5 | 29 × 48 | 1392 | 348 forgetting to shift the second row872 leaving out a partial product |
| 6 | 76 × 7 | 532 | no pattern to catch here |
| 7 | 47 × 6 | 282 | no pattern to catch here |
| 8 | 539 × 4 | 2156 | no pattern to catch here |
| 9 | 66 × 68 | 4488 | 3648 leaving out a partial product924 forgetting to shift the second row |
| 10 | 77 × 6 | 462 | no pattern to catch here |
| 11 | 37 × 4 | 148 | no pattern to catch here |
| 12 | 28 × 69 | 1932 | 1272 leaving out a partial product420 forgetting to shift the second row |
| 13 | 827 × 3 | 2481 | no pattern to catch here |
| 14 | 71 × 54 | 3834 | 3504 leaving out a partial product639 forgetting to shift the second row |
| 15 | 66 × 96 | 6336 | 5436 leaving out a partial product990 forgetting to shift the second row |
| 16 | 51 × 7 | 357 | no pattern to catch here |
| 17 | 368 × 5 | 1840 | no pattern to catch here |
| 18 | 48 × 51 | 2448 | 2008 leaving out a partial product288 forgetting to shift the second row |
| 19 | 81 × 89 | 7209 | 1377 forgetting to shift the second row6409 leaving out a partial product |
| 20 | 251 × 8 | 2008 | no pattern to catch here |
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.