Cardinal Math

Multi-digit multiplication · sheet 4 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 955 × 4 3820 no pattern to catch here
2 735 × 4 2940 no pattern to catch here
3 84 × 8 672 no pattern to catch here
4 22 × 2 44 no pattern to catch here
5 86 × 19 1634 854 leaving out a partial product860 forgetting to shift the second row
6 89 × 52 4628 4018 leaving out a partial product623 forgetting to shift the second row
7 43 × 2 86 no pattern to catch here
8 63 × 96 6048 5418 leaving out a partial product945 forgetting to shift the second row
9 64 × 3 192 no pattern to catch here
10 44 × 9 396 no pattern to catch here
11 56 × 9 504 no pattern to catch here
12 75 × 92 6900 6310 leaving out a partial product825 forgetting to shift the second row
13 911 × 9 8199 no pattern to catch here
14 651 × 9 5859 no pattern to catch here
15 57 × 43 2451 2021 leaving out a partial product399 forgetting to shift the second row
16 26 × 95 2470 1830 leaving out a partial product364 forgetting to shift the second row
17 14 × 96 1344 210 forgetting to shift the second row924 leaving out a partial product
18 38 × 96 3648 2748 leaving out a partial product570 forgetting to shift the second row
19 14 × 6 84 no pattern to catch here
20 45 × 2 90 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