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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 19 · 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. 1.32 + 21 =
  2. 2.45 + 12 =
  3. 3.70 + 21 =
  4. 4.76 + 22 =
  5. 5.52 + 14 =
  6. 6.39 + 87 =
  7. 7.34 + 51 =
  8. 8.49 + 25 =
  9. 9.63 + 62 =
  10. 10.58 + 56 =
  11. 11.57 + 61 =
  12. 12.50 + 42 =
  13. 13.22 + 76 =
  14. 14.83 + 76 =
  15. 15.78 + 88 =
  16. 16.30 + 41 =
  17. 17.79 + 14 =
  18. 18.48 + 68 =
  19. 19.80 + 67 =
  20. 20.62 + 41 =
  21. 21.66 + 73 =
  22. 22.75 + 78 =
  23. 23.24 + 49 =
  24. 24.80 + 48 =
  25. 25.48 + 44 =
  26. 26.43 + 73 =
  27. 27.22 + 38 =
  28. 28.47 + 72 =
  29. 29.88 + 12 =
  30. 30.85 + 64 =
  31. 31.66 + 89 =
  32. 32.85 + 24 =
  33. 33.71 + 58 =
  34. 34.44 + 36 =
  35. 35.22 + 71 =
  36. 36.76 + 72 =
  37. 37.68 + 43 =
  38. 38.43 + 65 =
  39. 39.53 + 22 =
  40. 40.77 + 85 =

Answer key

  1. 53
  2. 57
  3. 91
  4. 98
  5. 66
  6. 126
  7. 85
  8. 74
  9. 125
  10. 114
  11. 118
  12. 92
  13. 98
  14. 159
  15. 166
  16. 71
  17. 93
  18. 116
  19. 147
  20. 103
  21. 139
  22. 153
  23. 73
  24. 128
  25. 92
  26. 116
  27. 60
  28. 119
  29. 100
  30. 149
  31. 155
  32. 109
  33. 129
  34. 80
  35. 93
  36. 148
  37. 111
  38. 108
  39. 75
  40. 162

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