Cardinal Math

Multi-digit multiplication · sheet 21 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 35 × 34 1190 245 forgetting to shift the second row920 leaving out a partial product
2 97 × 12 1164 291 forgetting to shift the second row914 leaving out a partial product
3 323 × 2 646 no pattern to catch here
4 28 × 9 252 no pattern to catch here
5 31 × 44 1364 1204 leaving out a partial product248 forgetting to shift the second row
6 38 × 95 3610 2740 leaving out a partial product532 forgetting to shift the second row
7 81 × 9 729 no pattern to catch here
8 23 × 28 644 230 forgetting to shift the second row424 leaving out a partial product
9 62 × 5 310 no pattern to catch here
10 278 × 7 1946 no pattern to catch here
11 14 × 12 168 108 leaving out a partial product42 forgetting to shift the second row
12 35 × 8 280 no pattern to catch here
13 886 × 4 3544 no pattern to catch here
14 65 × 54 3510 3020 leaving out a partial product585 forgetting to shift the second row
15 96 × 8 768 no pattern to catch here
16 381 × 5 1905 no pattern to catch here
17 84 × 6 504 no pattern to catch here
18 67 × 6 402 no pattern to catch here
19 47 × 13 611 188 forgetting to shift the second row421 leaving out a partial product
20 97 × 4 388 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