Cardinal Math

Multi-digit multiplication · sheet 13 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 61 × 4 244 no pattern to catch here
2 76 × 26 1976 1436 leaving out a partial product608 forgetting to shift the second row
3 58 × 9 522 no pattern to catch here
4 46 × 77 3542 2842 leaving out a partial product644 forgetting to shift the second row
5 42 × 54 2268 2008 leaving out a partial product378 forgetting to shift the second row
6 12 × 58 696 156 forgetting to shift the second row516 leaving out a partial product
7 13 × 7 91 no pattern to catch here
8 79 × 98 7742 1343 forgetting to shift the second row6372 leaving out a partial product
9 54 × 8 432 no pattern to catch here
10 27 × 5 135 no pattern to catch here
11 328 × 8 2624 no pattern to catch here
12 82 × 6 492 no pattern to catch here
13 79 × 31 2449 2109 leaving out a partial product316 forgetting to shift the second row
14 515 × 7 3605 no pattern to catch here
15 96 × 79 7584 1536 forgetting to shift the second row6354 leaving out a partial product
16 95 × 2 190 no pattern to catch here
17 713 × 2 1426 no pattern to catch here
18 98 × 9 882 no pattern to catch here
19 96 × 59 5664 1344 forgetting to shift the second row4554 leaving out a partial product
20 129 × 4 516 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