2-digit − 2-digit subtraction with borrowing

Difficulty Starter · Set lp0vf8

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1
70−34=
2
92−45=
3
91−45=
4
26−17=
5
71−68=
6
75−67=
7
40−19=
8
84−27=
9
90−54=
10
42−14=
11
53−45=
12
80−57=
13
70−28=
14
30−21=
15
91−72=
16
30−16=
17
62−29=
18
74−37=
19
83−36=
20
23−19=

What is in this set

The numbers in this set run from 12 to 98.
Every problem in it will need a borrow from the column to the left.
A careful solution takes 3 written steps on average.
The mistake this set invites most often, in 100% of the problems: each column took the smaller digit from the larger one instead of borrowing from the column to its left.
Answers are a whole number.

Drawing 240 problems from this page produced 218 different ones, 91% — 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 2 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.