667 + 134
Common Core 3.NBT.A.2
3-digit addition with regrouping
Add ones, then tens, then hundreds. Whenever a column makes 10 or more, write the single digit and carry 1 to the next column. Do not forget a carry that lands on a hundreds digit.
One worked example
268 + 175
- 8 + 5 = 13. Write 3, carry 1.
- 1 + 6 + 7 = 14. Write 4, carry 1.
- 1 + 2 + 1 = 4. The sum is 443.
Answer: 443
Fluently add within 1,000.
Easy
Add. Regroup when a column needs it.
277 + 683
135 + 509
854 + 219
649 + 172
987 + 219
Answer key
- 801
- 960
- 644
- 1073
- 821
- 1206
Medium
Add. Regroup when a column needs it.
119 + 613
908 + 859
418 + 753
833 + 889
907 + 108
629 + 333
198 + 922
741 + 169
329 + 448
Answer key
- 732
- 1767
- 1171
- 1722
- 1015
- 962
- 1120
- 910
- 777
Hard
Add. Regroup when a column needs it.
968 + 192
319 + 503
169 + 523
389 + 917
582 + 689
523 + 267
476 + 719
104 + 716
582 + 908
816 + 228
533 + 809
684 + 629
Answer key
- 1160
- 822
- 692
- 1306
- 1271
- 790
- 1195
- 820
- 1490
- 1044
- 1342
- 1313
Related skills
The new-numbers button needs JavaScript. The downloaded PDF stays the original set, so a link you share does not change.