Cardinal Math

Multi-digit multiplication · sheet 3 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 76 × 78 5928 1140 forgetting to shift the second row4948 leaving out a partial product
2 96 × 36 3456 2736 leaving out a partial product864 forgetting to shift the second row
3 66 × 16 1056 462 forgetting to shift the second row636 leaving out a partial product
4 81 × 3 243 no pattern to catch here
5 76 × 3 228 no pattern to catch here
6 13 × 49 637 169 forgetting to shift the second row427 leaving out a partial product
7 352 × 5 1760 no pattern to catch here
8 26 × 57 1482 1042 leaving out a partial product312 forgetting to shift the second row
9 376 × 7 2632 no pattern to catch here
10 74 × 3 222 no pattern to catch here
11 55 × 4 220 no pattern to catch here
12 118 × 6 708 no pattern to catch here
13 617 × 6 3702 no pattern to catch here
14 66 × 4 264 no pattern to catch here
15 92 × 75 6900 1104 forgetting to shift the second row6310 leaving out a partial product
16 88 × 6 528 no pattern to catch here
17 39 × 77 3003 2163 leaving out a partial product546 forgetting to shift the second row
18 73 × 5 365 no pattern to catch here
19 18 × 86 1548 252 forgetting to shift the second row848 leaving out a partial product
20 89 × 6 534 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.

Leaving out a partial product 8 of 20 problems

Forgetting to shift the second row 8 of 20 problems