Multi-digit multiplication · sheet 29 of 30
Answer key
The answer, and what a wrong answer means.
| # | Problem | Answer | If they wrote… |
|---|---|---|---|
| 1 | 387 × 4 | 1548 | no pattern to catch here |
| 2 | 61 × 3 | 183 | no pattern to catch here |
| 3 | 78 × 34 | 2652 | 2132 leaving out a partial product546 forgetting to shift the second row |
| 4 | 85 × 61 | 5185 | 4805 leaving out a partial product595 forgetting to shift the second row |
| 5 | 25 × 8 | 200 | no pattern to catch here |
| 6 | 58 × 31 | 1798 | 1508 leaving out a partial product232 forgetting to shift the second row |
| 7 | 686 × 8 | 5488 | no pattern to catch here |
| 8 | 78 × 31 | 2418 | 2108 leaving out a partial product312 forgetting to shift the second row |
| 9 | 15 × 7 | 105 | no pattern to catch here |
| 10 | 38 × 9 | 342 | no pattern to catch here |
| 11 | 89 × 7 | 623 | no pattern to catch here |
| 12 | 37 × 74 | 2738 | 2128 leaving out a partial product407 forgetting to shift the second row |
| 13 | 11 × 57 | 627 | 132 forgetting to shift the second row507 leaving out a partial product |
| 14 | 82 × 6 | 492 | no pattern to catch here |
| 15 | 87 × 35 | 3045 | 2435 leaving out a partial product696 forgetting to shift the second row |
| 16 | 73 × 4 | 292 | no pattern to catch here |
| 17 | 85 × 9 | 765 | no pattern to catch here |
| 18 | 379 × 3 | 1137 | no pattern to catch here |
| 19 | 394 × 2 | 788 | no pattern to catch here |
| 20 | 79 × 51 | 4029 | 3509 leaving out a partial product474 forgetting to shift the second row |
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.