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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 433 · 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. 1.52 + 15 =
  2. 2.86 + 51 =
  3. 3.88 + 41 =
  4. 4.85 + 22 =
  5. 5.41 + 58 =
  6. 6.27 + 33 =
  7. 7.32 + 53 =
  8. 8.23 + 72 =
  9. 9.47 + 87 =
  10. 10.54 + 19 =
  11. 11.58 + 46 =
  12. 12.29 + 61 =
  13. 13.62 + 28 =
  14. 14.44 + 24 =
  15. 15.53 + 52 =
  16. 16.88 + 15 =
  17. 17.74 + 73 =
  18. 18.87 + 28 =
  19. 19.53 + 18 =
  20. 20.85 + 46 =
  21. 21.54 + 13 =
  22. 22.53 + 63 =
  23. 23.84 + 71 =
  24. 24.80 + 72 =
  25. 25.27 + 25 =
  26. 26.33 + 62 =
  27. 27.75 + 37 =
  28. 28.26 + 58 =
  29. 29.34 + 86 =
  30. 30.87 + 41 =
  31. 31.72 + 63 =
  32. 32.73 + 47 =
  33. 33.27 + 79 =
  34. 34.34 + 14 =
  35. 35.36 + 77 =
  36. 36.88 + 51 =
  37. 37.33 + 25 =
  38. 38.64 + 29 =
  39. 39.82 + 59 =
  40. 40.68 + 21 =

Answer key

  1. 67
  2. 137
  3. 129
  4. 107
  5. 99
  6. 60
  7. 85
  8. 95
  9. 134
  10. 73
  11. 104
  12. 90
  13. 90
  14. 68
  15. 105
  16. 103
  17. 147
  18. 115
  19. 71
  20. 131
  21. 67
  22. 116
  23. 155
  24. 152
  25. 52
  26. 95
  27. 112
  28. 84
  29. 120
  30. 128
  31. 135
  32. 120
  33. 106
  34. 48
  35. 113
  36. 139
  37. 58
  38. 93
  39. 141
  40. 89

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