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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 425 · 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. 1.59 + 68 =
  2. 2.42 + 47 =
  3. 3.50 + 32 =
  4. 4.21 + 76 =
  5. 5.42 + 67 =
  6. 6.48 + 49 =
  7. 7.37 + 71 =
  8. 8.34 + 47 =
  9. 9.52 + 78 =
  10. 10.56 + 17 =
  11. 11.88 + 24 =
  12. 12.29 + 85 =
  13. 13.71 + 39 =
  14. 14.72 + 67 =
  15. 15.69 + 83 =
  16. 16.49 + 28 =
  17. 17.32 + 47 =
  18. 18.87 + 79 =
  19. 19.24 + 21 =
  20. 20.75 + 26 =
  21. 21.37 + 39 =
  22. 22.54 + 16 =
  23. 23.85 + 61 =
  24. 24.38 + 39 =
  25. 25.72 + 88 =
  26. 26.87 + 75 =
  27. 27.32 + 31 =
  28. 28.67 + 33 =
  29. 29.37 + 62 =
  30. 30.30 + 22 =
  31. 31.57 + 42 =
  32. 32.40 + 78 =
  33. 33.38 + 58 =
  34. 34.29 + 29 =
  35. 35.44 + 61 =
  36. 36.61 + 58 =
  37. 37.63 + 19 =
  38. 38.70 + 75 =
  39. 39.86 + 13 =
  40. 40.70 + 31 =

Answer key

  1. 127
  2. 89
  3. 82
  4. 97
  5. 109
  6. 97
  7. 108
  8. 81
  9. 130
  10. 73
  11. 112
  12. 114
  13. 110
  14. 139
  15. 152
  16. 77
  17. 79
  18. 166
  19. 45
  20. 101
  21. 76
  22. 70
  23. 146
  24. 77
  25. 160
  26. 162
  27. 63
  28. 100
  29. 99
  30. 52
  31. 99
  32. 118
  33. 96
  34. 58
  35. 105
  36. 119
  37. 82
  38. 145
  39. 99
  40. 101

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