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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 465 · 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. 1.69 + 23 =
  2. 2.31 + 41 =
  3. 3.47 + 68 =
  4. 4.49 + 63 =
  5. 5.55 + 38 =
  6. 6.26 + 17 =
  7. 7.68 + 83 =
  8. 8.47 + 86 =
  9. 9.29 + 55 =
  10. 10.62 + 63 =
  11. 11.34 + 12 =
  12. 12.27 + 55 =
  13. 13.51 + 24 =
  14. 14.89 + 49 =
  15. 15.66 + 17 =
  16. 16.68 + 21 =
  17. 17.39 + 14 =
  18. 18.23 + 36 =
  19. 19.40 + 63 =
  20. 20.74 + 88 =
  21. 21.41 + 14 =
  22. 22.69 + 29 =
  23. 23.48 + 39 =
  24. 24.50 + 32 =
  25. 25.58 + 31 =
  26. 26.25 + 27 =
  27. 27.42 + 59 =
  28. 28.70 + 64 =
  29. 29.33 + 12 =
  30. 30.74 + 27 =
  31. 31.35 + 56 =
  32. 32.37 + 86 =
  33. 33.54 + 33 =
  34. 34.39 + 49 =
  35. 35.41 + 84 =
  36. 36.61 + 63 =
  37. 37.67 + 65 =
  38. 38.85 + 87 =
  39. 39.45 + 76 =
  40. 40.22 + 77 =

Answer key

  1. 92
  2. 72
  3. 115
  4. 112
  5. 93
  6. 43
  7. 151
  8. 133
  9. 84
  10. 125
  11. 46
  12. 82
  13. 75
  14. 138
  15. 83
  16. 89
  17. 53
  18. 59
  19. 103
  20. 162
  21. 55
  22. 98
  23. 87
  24. 82
  25. 89
  26. 52
  27. 101
  28. 134
  29. 45
  30. 101
  31. 91
  32. 123
  33. 87
  34. 88
  35. 125
  36. 124
  37. 132
  38. 172
  39. 121
  40. 99

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