Cardinal Math

Multi-digit multiplication · sheet 15 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 54 × 4 216 no pattern to catch here
2 69 × 2 138 no pattern to catch here
3 68 × 4 272 no pattern to catch here
4 95 × 5 475 no pattern to catch here
5 913 × 3 2739 no pattern to catch here
6 335 × 6 2010 no pattern to catch here
7 885 × 2 1770 no pattern to catch here
8 82 × 17 1394 656 forgetting to shift the second row814 leaving out a partial product
9 37 × 68 2516 1856 leaving out a partial product518 forgetting to shift the second row
10 98 × 9 882 no pattern to catch here
11 31 × 87 2697 2407 leaving out a partial product465 forgetting to shift the second row
12 49 × 3 147 no pattern to catch here
13 68 × 74 5032 4232 leaving out a partial product748 forgetting to shift the second row
14 58 × 72 4176 3516 leaving out a partial product522 forgetting to shift the second row
15 37 × 57 2109 1549 leaving out a partial product444 forgetting to shift the second row
16 86 × 7 602 no pattern to catch here
17 26 × 8 208 no pattern to catch here
18 415 × 6 2490 no pattern to catch here
19 31 × 79 2449 2109 leaving out a partial product496 forgetting to shift the second row
20 48 × 12 576 144 forgetting to shift the second row416 leaving out a partial product

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