Cardinal Math

Multi-digit multiplication · sheet 10 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 312 × 5 1560 no pattern to catch here
2 68 × 7 476 no pattern to catch here
3 45 × 54 2430 2020 leaving out a partial product405 forgetting to shift the second row
4 61 × 72 4392 4202 leaving out a partial product549 forgetting to shift the second row
5 92 × 5 460 no pattern to catch here
6 73 × 24 1752 1412 leaving out a partial product438 forgetting to shift the second row
7 972 × 7 6804 no pattern to catch here
8 64 × 6 384 no pattern to catch here
9 54 × 7 378 no pattern to catch here
10 41 × 7 287 no pattern to catch here
11 679 × 2 1358 no pattern to catch here
12 47 × 7 329 no pattern to catch here
13 31 × 97 3007 2707 leaving out a partial product496 forgetting to shift the second row
14 83 × 3 249 no pattern to catch here
15 87 × 8 696 no pattern to catch here
16 75 × 28 2100 1440 leaving out a partial product750 forgetting to shift the second row
17 954 × 5 4770 no pattern to catch here
18 58 × 61 3538 3008 leaving out a partial product406 forgetting to shift the second row
19 13 × 72 936 117 forgetting to shift the second row706 leaving out a partial product
20 27 × 16 432 189 forgetting to shift the second row242 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