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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 209 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.22 + 35 =
  2. 2.38 + 62 =
  3. 3.85 + 39 =
  4. 4.54 + 34 =
  5. 5.30 + 68 =
  6. 6.35 + 67 =
  7. 7.52 + 21 =
  8. 8.74 + 22 =
  9. 9.73 + 58 =
  10. 10.65 + 27 =
  11. 11.82 + 84 =
  12. 12.36 + 41 =
  13. 13.24 + 52 =
  14. 14.22 + 45 =
  15. 15.53 + 51 =
  16. 16.56 + 36 =
  17. 17.26 + 19 =
  18. 18.87 + 16 =
  19. 19.64 + 55 =
  20. 20.28 + 88 =
  21. 21.33 + 16 =
  22. 22.42 + 34 =
  23. 23.63 + 14 =
  24. 24.28 + 18 =
  25. 25.29 + 51 =
  26. 26.64 + 56 =
  27. 27.82 + 81 =
  28. 28.28 + 43 =
  29. 29.32 + 73 =
  30. 30.65 + 88 =
  31. 31.25 + 42 =
  32. 32.51 + 84 =
  33. 33.55 + 18 =
  34. 34.60 + 55 =
  35. 35.69 + 34 =
  36. 36.27 + 88 =
  37. 37.61 + 63 =
  38. 38.56 + 45 =
  39. 39.45 + 87 =
  40. 40.23 + 19 =

Answer key

  1. 57
  2. 100
  3. 124
  4. 88
  5. 98
  6. 102
  7. 73
  8. 96
  9. 131
  10. 92
  11. 166
  12. 77
  13. 76
  14. 67
  15. 104
  16. 92
  17. 45
  18. 103
  19. 119
  20. 116
  21. 49
  22. 76
  23. 77
  24. 46
  25. 80
  26. 120
  27. 163
  28. 71
  29. 105
  30. 153
  31. 67
  32. 135
  33. 73
  34. 115
  35. 103
  36. 115
  37. 124
  38. 101
  39. 132
  40. 42

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