Cardinal Math

Multi-digit multiplication · sheet 20 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 33 × 9 297 no pattern to catch here
2 28 × 7 196 no pattern to catch here
3 458 × 2 916 no pattern to catch here
4 36 × 72 2592 2112 leaving out a partial product324 forgetting to shift the second row
5 12 × 7 84 no pattern to catch here
6 14 × 62 868 112 forgetting to shift the second row608 leaving out a partial product
7 17 × 43 731 119 forgetting to shift the second row421 leaving out a partial product
8 35 × 75 2625 2125 leaving out a partial product420 forgetting to shift the second row
9 19 × 89 1691 323 forgetting to shift the second row881 leaving out a partial product
10 14 × 5 70 no pattern to catch here
11 413 × 9 3717 no pattern to catch here
12 14 × 8 112 no pattern to catch here
13 13 × 8 104 no pattern to catch here
14 493 × 3 1479 no pattern to catch here
15 12 × 8 96 no pattern to catch here
16 65 × 12 780 195 forgetting to shift the second row610 leaving out a partial product
17 646 × 8 5168 no pattern to catch here
18 17 × 4 68 no pattern to catch here
19 61 × 89 5429 1037 forgetting to shift the second row4809 leaving out a partial product
20 33 × 46 1518 1218 leaving out a partial product330 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.

Leaving out a partial product 8 of 20 problems

Forgetting to shift the second row 8 of 20 problems