Cardinal Math

Multi-digit multiplication · sheet 17 of 30

Answer key

The answer, and what a wrong answer means.

The sheet
#ProblemAnswerIf they wrote…
1 24 × 27 648 216 forgetting to shift the second row428 leaving out a partial product
2 75 × 3 225 no pattern to catch here
3 59 × 74 4366 3536 leaving out a partial product649 forgetting to shift the second row
4 93 × 5 465 no pattern to catch here
5 11 × 6 66 no pattern to catch here
6 77 × 6 462 no pattern to catch here
7 73 × 5 365 no pattern to catch here
8 477 × 2 954 no pattern to catch here
9 56 × 5 280 no pattern to catch here
10 28 × 36 1008 252 forgetting to shift the second row648 leaving out a partial product
11 13 × 5 65 no pattern to catch here
12 82 × 78 6396 1230 forgetting to shift the second row5616 leaving out a partial product
13 26 × 7 182 no pattern to catch here
14 559 × 6 3354 no pattern to catch here
15 128 × 7 896 no pattern to catch here
16 36 × 14 504 180 forgetting to shift the second row324 leaving out a partial product
17 16 × 29 464 176 forgetting to shift the second row254 leaving out a partial product
18 538 × 3 1614 no pattern to catch here
19 17 × 18 306 153 forgetting to shift the second row156 leaving out a partial product
20 63 × 35 2205 1815 leaving out a partial product504 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