2-digit × 2-digit multiplication

Difficulty Standard · Set lrir5q

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1
11×52
2
94×60
3
52×64
4
98×87
5
20×58
6
73×90
7
34×69
8
73×23
9
88×97
10
49×14
11
44×95
12
86×46
13
72×90
14
32×99
15
69×60
16
69×42
17
21×44
18
45×76
19
80×87
20
85×70

What is in this set

The numbers in this set run from 10 to 99.
Every problem in it will need two partial products and a shift.
A careful solution takes 5 written steps on average.
The mistake this set invites most often, in 100% of the problems: the second partial product was written under the first instead of shifted one place left, so the tens digit was multiplied as if it were units.
Answers are a whole number.

Drawing 240 problems from this page produced 231 different ones, 96% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 4 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.