SumComb

6-digit + 6-digit addition with carrying

Difficulty Stretch · Set u8i8s9

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

  1. 1
    289788+972794

  2. 2
    828908+474494

  3. 3
    194937+895078

  4. 4
    295397+708877

  5. 5
    498322+974999

  6. 6
    547457+899885

  7. 7
    298894+978429

  8. 8
    874473+579877

  9. 9
    978321+197799

  10. 10
    271928+739886

  11. 11
    985258+756797

  12. 12
    692872+468639

  13. 13
    145599+895633

  14. 14
    385388+849864

  15. 15
    865474+578839

  16. 16
    569705+667799

  17. 17
    539698+673532

  18. 18
    684886+576169

  19. 19
    899638+712696

  20. 20
    618476+689977

What is in this set

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.

Next to this

6-digit + 6-digit addition, no carrying

Numbers 100,010–9,893,836; every one will come out column by column with nothing carried.

Adding three 2-digit numbers

Numbers 10–99; 99% need a carry into the next column.

Missing addend with 3-digit numbers

Numbers 1,137–10,869; every one will need a borrow from the column to the left.

All of addition

29 skills in this topic, 82 sets between them.

Printing it

The printed sheet carries no menus and no advertising, and the answer key is on its own page.