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1
8458−1468
2
6428−1132
3
7266−3731
4
8308−5052
5
8532−1105
6
8383−6355
7
9905−1175
8
7439−4908
9
4627−2079
10
8909−7952
11
5591−2771
12
6686−3668
13
4434−1757
14
6348−3661
15
7945−5795
16
6546−4538
17
5783−2184
18
9543−8147
19
9442−2305
20
6901−5328
Answer key
What is in this set
The numbers in this set run from 1,037 to 9,987.
Every problem in it will need a borrow from the column to the left.
A careful solution takes 5 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 240 different ones, 100% — so a sheet of 20 is a new sheet almost every time.
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.