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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 48 · 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. 1.87 + 59 =
  2. 2.51 + 79 =
  3. 3.34 + 45 =
  4. 4.73 + 24 =
  5. 5.80 + 24 =
  6. 6.88 + 64 =
  7. 7.73 + 76 =
  8. 8.32 + 61 =
  9. 9.40 + 21 =
  10. 10.42 + 12 =
  11. 11.69 + 19 =
  12. 12.60 + 75 =
  13. 13.29 + 12 =
  14. 14.56 + 75 =
  15. 15.85 + 27 =
  16. 16.37 + 51 =
  17. 17.46 + 51 =
  18. 18.22 + 71 =
  19. 19.47 + 63 =
  20. 20.50 + 88 =
  21. 21.71 + 44 =
  22. 22.25 + 58 =
  23. 23.76 + 36 =
  24. 24.29 + 88 =
  25. 25.50 + 65 =
  26. 26.30 + 51 =
  27. 27.62 + 33 =
  28. 28.25 + 86 =
  29. 29.40 + 48 =
  30. 30.21 + 54 =
  31. 31.25 + 52 =
  32. 32.41 + 35 =
  33. 33.63 + 83 =
  34. 34.32 + 74 =
  35. 35.23 + 13 =
  36. 36.28 + 31 =
  37. 37.59 + 53 =
  38. 38.41 + 72 =
  39. 39.68 + 17 =
  40. 40.30 + 64 =

Answer key

  1. 146
  2. 130
  3. 79
  4. 97
  5. 104
  6. 152
  7. 149
  8. 93
  9. 61
  10. 54
  11. 88
  12. 135
  13. 41
  14. 131
  15. 112
  16. 88
  17. 97
  18. 93
  19. 110
  20. 138
  21. 115
  22. 83
  23. 112
  24. 117
  25. 115
  26. 81
  27. 95
  28. 111
  29. 88
  30. 75
  31. 77
  32. 76
  33. 146
  34. 106
  35. 36
  36. 59
  37. 112
  38. 113
  39. 85
  40. 94

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