4-digit + 4-digit addition with carrying

Difficulty Standard · Set qmkp99

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1
8060+7290
2
7071+4441
3
1591+2022
4
1306+2917
5
9502+1988
6
7806+5693
7
8442+6958
8
2140+8277
9
3318+3078
10
6869+4127
11
8493+2257
12
2642+5701
13
8585+6289
14
6403+3829
15
6723+1468
16
9026+8439
17
4138+3523
18
6265+2667
19
8298+6200
20
1562+1517

What is in this set

The numbers in this set run from 1,017 to 9,986.
Every problem in it will need a carry into the next column.
A careful solution takes 5 written steps on average.
The mistake this set invites most often, in 100% of the problems: every column was added on its own and the carry never moved into the next one.
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.

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.