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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 450 · 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. 1.74 + 14 =
  2. 2.45 + 49 =
  3. 3.30 + 68 =
  4. 4.86 + 77 =
  5. 5.45 + 75 =
  6. 6.53 + 29 =
  7. 7.60 + 23 =
  8. 8.65 + 47 =
  9. 9.88 + 19 =
  10. 10.76 + 33 =
  11. 11.62 + 55 =
  12. 12.37 + 85 =
  13. 13.76 + 17 =
  14. 14.26 + 74 =
  15. 15.58 + 45 =
  16. 16.31 + 14 =
  17. 17.51 + 28 =
  18. 18.71 + 89 =
  19. 19.43 + 39 =
  20. 20.41 + 63 =
  21. 21.51 + 31 =
  22. 22.29 + 47 =
  23. 23.63 + 21 =
  24. 24.64 + 67 =
  25. 25.52 + 36 =
  26. 26.55 + 14 =
  27. 27.28 + 13 =
  28. 28.47 + 18 =
  29. 29.30 + 33 =
  30. 30.87 + 58 =
  31. 31.77 + 15 =
  32. 32.80 + 84 =
  33. 33.25 + 21 =
  34. 34.31 + 76 =
  35. 35.67 + 25 =
  36. 36.76 + 67 =
  37. 37.53 + 76 =
  38. 38.71 + 21 =
  39. 39.52 + 43 =
  40. 40.67 + 48 =

Answer key

  1. 88
  2. 94
  3. 98
  4. 163
  5. 120
  6. 82
  7. 83
  8. 112
  9. 107
  10. 109
  11. 117
  12. 122
  13. 93
  14. 100
  15. 103
  16. 45
  17. 79
  18. 160
  19. 82
  20. 104
  21. 82
  22. 76
  23. 84
  24. 131
  25. 88
  26. 69
  27. 41
  28. 65
  29. 63
  30. 145
  31. 92
  32. 164
  33. 46
  34. 107
  35. 92
  36. 143
  37. 129
  38. 92
  39. 95
  40. 115

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