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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 43 · 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. 1.29 + 54 =
  2. 2.78 + 29 =
  3. 3.73 + 15 =
  4. 4.80 + 25 =
  5. 5.40 + 42 =
  6. 6.53 + 18 =
  7. 7.63 + 37 =
  8. 8.27 + 88 =
  9. 9.43 + 84 =
  10. 10.67 + 71 =
  11. 11.63 + 35 =
  12. 12.30 + 32 =
  13. 13.41 + 78 =
  14. 14.33 + 31 =
  15. 15.87 + 63 =
  16. 16.76 + 45 =
  17. 17.24 + 14 =
  18. 18.25 + 17 =
  19. 19.75 + 22 =
  20. 20.38 + 71 =
  21. 21.29 + 24 =
  22. 22.63 + 45 =
  23. 23.89 + 43 =
  24. 24.75 + 71 =
  25. 25.21 + 53 =
  26. 26.25 + 22 =
  27. 27.54 + 64 =
  28. 28.31 + 88 =
  29. 29.53 + 36 =
  30. 30.74 + 12 =
  31. 31.58 + 88 =
  32. 32.40 + 67 =
  33. 33.79 + 48 =
  34. 34.55 + 13 =
  35. 35.66 + 19 =
  36. 36.30 + 55 =
  37. 37.89 + 48 =
  38. 38.88 + 23 =
  39. 39.31 + 41 =
  40. 40.77 + 58 =

Answer key

  1. 83
  2. 107
  3. 88
  4. 105
  5. 82
  6. 71
  7. 100
  8. 115
  9. 127
  10. 138
  11. 98
  12. 62
  13. 119
  14. 64
  15. 150
  16. 121
  17. 38
  18. 42
  19. 97
  20. 109
  21. 53
  22. 108
  23. 132
  24. 146
  25. 74
  26. 47
  27. 118
  28. 119
  29. 89
  30. 86
  31. 146
  32. 107
  33. 127
  34. 68
  35. 85
  36. 85
  37. 137
  38. 111
  39. 72
  40. 135

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