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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 123 · 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. 1.44 + 56 =
  2. 2.53 + 42 =
  3. 3.77 + 63 =
  4. 4.64 + 37 =
  5. 5.32 + 73 =
  6. 6.34 + 26 =
  7. 7.28 + 56 =
  8. 8.71 + 61 =
  9. 9.50 + 85 =
  10. 10.59 + 16 =
  11. 11.48 + 73 =
  12. 12.82 + 61 =
  13. 13.22 + 52 =
  14. 14.59 + 69 =
  15. 15.35 + 73 =
  16. 16.52 + 44 =
  17. 17.66 + 71 =
  18. 18.73 + 55 =
  19. 19.78 + 42 =
  20. 20.28 + 85 =
  21. 21.36 + 66 =
  22. 22.43 + 66 =
  23. 23.34 + 44 =
  24. 24.60 + 15 =
  25. 25.45 + 34 =
  26. 26.23 + 26 =
  27. 27.52 + 35 =
  28. 28.85 + 74 =
  29. 29.35 + 17 =
  30. 30.78 + 15 =
  31. 31.29 + 14 =
  32. 32.75 + 48 =
  33. 33.50 + 65 =
  34. 34.27 + 69 =
  35. 35.75 + 81 =
  36. 36.68 + 58 =
  37. 37.30 + 15 =
  38. 38.44 + 55 =
  39. 39.84 + 34 =
  40. 40.75 + 43 =

Answer key

  1. 100
  2. 95
  3. 140
  4. 101
  5. 105
  6. 60
  7. 84
  8. 132
  9. 135
  10. 75
  11. 121
  12. 143
  13. 74
  14. 128
  15. 108
  16. 96
  17. 137
  18. 128
  19. 120
  20. 113
  21. 102
  22. 109
  23. 78
  24. 75
  25. 79
  26. 49
  27. 87
  28. 159
  29. 52
  30. 93
  31. 43
  32. 123
  33. 115
  34. 96
  35. 156
  36. 126
  37. 45
  38. 99
  39. 118
  40. 118

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