← Back to lesson·Advance A · W2 D1 · 2 drill sections · ~5 min

Advance A · Week 2 · Addition & Subtraction Mastery

Day 1 Practice Worksheet — Left-to-Right Addition

Adding 2- and 3-digit numbers from the highest place value.

Name
Date
Score

  1. §12-digit addition

    ⏱ 2 min · 20 problems

    Timed drill — start a 2-minute timer, then solve in order. Goal: finish under time with full accuracy.

    1. 01.81 + 14=
    2. 02.32 + 93=
    3. 03.29 + 51=
    4. 04.41 + 51=
    5. 05.21 + 85=
    6. 06.71 + 28=
    7. 07.26 + 59=
    8. 08.66 + 66=
    9. 09.85 + 45=
    10. 10.43 + 90=
    11. 11.12 + 39=
    12. 12.21 + 49=
    13. 13.84 + 57=
    14. 14.85 + 80=
    15. 15.86 + 57=
    16. 16.58 + 49=
    17. 17.14 + 82=
    18. 18.46 + 77=
    19. 19.19 + 13=
    20. 20.74 + 51=

  2. §23-digit addition

    ⏱ 3 min · 20 problems

    Timed drill — start a 3-minute timer, then solve in order. Goal: finish under time with full accuracy.

    1. 01.204 + 695=
    2. 02.522 + 938=
    3. 03.369 + 219=
    4. 04.940 + 306=
    5. 05.332 + 945=
    6. 06.490 + 160=
    7. 07.268 + 521=
    8. 08.361 + 155=
    9. 09.907 + 625=
    10. 10.485 + 104=
    11. 11.403 + 317=
    12. 12.121 + 699=
    13. 13.660 + 845=
    14. 14.875 + 281=
    15. 15.421 + 805=
    16. 16.592 + 868=
    17. 17.873 + 834=
    18. 18.282 + 881=
    19. 19.936 + 162=
    20. 20.793 + 340=

Answer Key

§1 · 2-digit addition

  1. 1.95
  2. 2.125
  3. 3.80
  4. 4.92
  5. 5.106
  6. 6.99
  7. 7.85
  8. 8.132
  9. 9.130
  10. 10.133
  11. 11.51
  12. 12.70
  13. 13.141
  14. 14.165
  15. 15.143
  16. 16.107
  17. 17.96
  18. 18.123
  19. 19.32
  20. 20.125

§2 · 3-digit addition

  1. 1.899
  2. 2.1460
  3. 3.588
  4. 4.1246
  5. 5.1277
  6. 6.650
  7. 7.789
  8. 8.516
  9. 9.1532
  10. 10.589
  11. 11.720
  12. 12.820
  13. 13.1505
  14. 14.1156
  15. 15.1226
  16. 16.1460
  17. 17.1707
  18. 18.1163
  19. 19.1098
  20. 20.1133