6-digit + 6-digit addition with carrying

Difficulty Starter · Set yaoadj

Fill in what you can and press Check. Nothing you type is sent anywhere.

1
602390+392239=
2
244906+844040=
3
622454+305218=
4
311894+681041=
5
110252+294546=
6
270217+364052=
7
133264+476201=
8
540611+531371=
9
145450+627016=
10
914780+155019=
11
624072+362051=
12
612229+363433=
13
353114+376015=
14
780681+202091=
15
805222+403264=
16
302961+440725=
17
806003+350790=
18
362412+624924=
19
110278+742616=
20
522412+505470=

What is in this set

The numbers in this set run from 100,608 to 994,252.
Every problem in it will need a carry into the next column.
A careful solution takes 7 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 5 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.