← 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 + 62=
    2. 02.19 + 41=
    3. 03.39 + 67=
    4. 04.84 + 44=
    5. 05.21 + 58=
    6. 06.46 + 31=
    7. 07.29 + 31=
    8. 08.83 + 65=
    9. 09.61 + 97=
    10. 10.14 + 84=
    11. 11.87 + 51=
    12. 12.70 + 73=
    13. 13.49 + 66=
    14. 14.74 + 98=
    15. 15.56 + 83=
    16. 16.89 + 59=
    17. 17.17 + 14=
    18. 18.23 + 67=
    19. 19.91 + 62=
    20. 20.81 + 38=

  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. 01.798 + 251=
    2. 02.854 + 306=
    3. 03.578 + 991=
    4. 04.933 + 183=
    5. 05.536 + 612=
    6. 06.323 + 974=
    7. 07.824 + 827=
    8. 08.282 + 387=
    9. 09.461 + 163=
    10. 10.498 + 377=
    11. 11.955 + 404=
    12. 12.510 + 734=
    13. 13.125 + 847=
    14. 14.774 + 176=
    15. 15.262 + 933=
    16. 16.719 + 280=
    17. 17.113 + 693=
    18. 18.707 + 608=
    19. 19.536 + 685=
    20. 20.757 + 836=

Answer Key

§1 · 2-digit addition

  1. 1.143
  2. 2.60
  3. 3.106
  4. 4.128
  5. 5.79
  6. 6.77
  7. 7.60
  8. 8.148
  9. 9.158
  10. 10.98
  11. 11.138
  12. 12.143
  13. 13.115
  14. 14.172
  15. 15.139
  16. 16.148
  17. 17.31
  18. 18.90
  19. 19.153
  20. 20.119

§2 · 3-digit addition

  1. 1.1049
  2. 2.1160
  3. 3.1569
  4. 4.1116
  5. 5.1148
  6. 6.1297
  7. 7.1651
  8. 8.669
  9. 9.624
  10. 10.875
  11. 11.1359
  12. 12.1244
  13. 13.972
  14. 14.950
  15. 15.1195
  16. 16.999
  17. 17.806
  18. 18.1315
  19. 19.1221
  20. 20.1593