4-digit + 3-digit addition with carrying

Difficulty Stretch · Set thuw7u

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1
7799+579
2
2886+937
3
2498+634
4
4889+928
5
8585+967
6
8777+595
7
6288+866
8
6546+877
9
4319+996
10
2687+727
11
7049+991
12
6385+985
13
3139+971
14
1817+295
15
7568+637
16
1978+833
17
6298+733
18
9824+869
19
9940+761
20
6766+835

What is in this set

The numbers in this set run from 116 to 9,978.
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 3 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.