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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 88 · 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. 1.70 + 73 =
  2. 2.68 + 46 =
  3. 3.89 + 23 =
  4. 4.84 + 12 =
  5. 5.75 + 23 =
  6. 6.51 + 83 =
  7. 7.53 + 83 =
  8. 8.68 + 75 =
  9. 9.74 + 67 =
  10. 10.66 + 83 =
  11. 11.49 + 21 =
  12. 12.79 + 77 =
  13. 13.44 + 39 =
  14. 14.85 + 29 =
  15. 15.26 + 69 =
  16. 16.86 + 44 =
  17. 17.63 + 67 =
  18. 18.67 + 35 =
  19. 19.58 + 31 =
  20. 20.88 + 85 =
  21. 21.65 + 34 =
  22. 22.76 + 89 =
  23. 23.35 + 56 =
  24. 24.78 + 61 =
  25. 25.89 + 47 =
  26. 26.33 + 24 =
  27. 27.82 + 87 =
  28. 28.24 + 53 =
  29. 29.44 + 55 =
  30. 30.74 + 19 =
  31. 31.24 + 42 =
  32. 32.67 + 13 =
  33. 33.56 + 18 =
  34. 34.63 + 14 =
  35. 35.57 + 24 =
  36. 36.24 + 65 =
  37. 37.34 + 63 =
  38. 38.51 + 21 =
  39. 39.44 + 54 =
  40. 40.81 + 18 =

Answer key

  1. 143
  2. 114
  3. 112
  4. 96
  5. 98
  6. 134
  7. 136
  8. 143
  9. 141
  10. 149
  11. 70
  12. 156
  13. 83
  14. 114
  15. 95
  16. 130
  17. 130
  18. 102
  19. 89
  20. 173
  21. 99
  22. 165
  23. 91
  24. 139
  25. 136
  26. 57
  27. 169
  28. 77
  29. 99
  30. 93
  31. 66
  32. 80
  33. 74
  34. 77
  35. 81
  36. 89
  37. 97
  38. 72
  39. 98
  40. 99

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