Cardinal Math

Multi-digit multiplication · sheet 5 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 976 × 4 3904 no pattern to catch here
2 12 × 11 132 102 leaving out a partial product24 forgetting to shift the second row
3 95 × 4 380 no pattern to catch here
4 995 × 5 4975 no pattern to catch here
5 912 × 7 6384 no pattern to catch here
6 81 × 84 6804 6404 leaving out a partial product972 forgetting to shift the second row
7 981 × 4 3924 no pattern to catch here
8 45 × 8 360 no pattern to catch here
9 49 × 5 245 no pattern to catch here
10 69 × 8 552 no pattern to catch here
11 31 × 8 248 no pattern to catch here
12 84 × 28 2352 1632 leaving out a partial product840 forgetting to shift the second row
13 35 × 84 2940 2420 leaving out a partial product420 forgetting to shift the second row
14 79 × 6 474 no pattern to catch here
15 22 × 3 66 no pattern to catch here
16 13 × 72 936 117 forgetting to shift the second row706 leaving out a partial product
17 33 × 62 2046 1806 leaving out a partial product264 forgetting to shift the second row
18 79 × 28 2212 1472 leaving out a partial product790 forgetting to shift the second row
19 88 × 33 2904 2424 leaving out a partial product528 forgetting to shift the second row
20 25 × 3 75 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