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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 320 · 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. 1.50 + 66 =
  2. 2.53 + 15 =
  3. 3.73 + 85 =
  4. 4.73 + 31 =
  5. 5.76 + 34 =
  6. 6.54 + 36 =
  7. 7.44 + 39 =
  8. 8.57 + 25 =
  9. 9.52 + 41 =
  10. 10.58 + 74 =
  11. 11.21 + 77 =
  12. 12.58 + 19 =
  13. 13.84 + 41 =
  14. 14.78 + 45 =
  15. 15.67 + 64 =
  16. 16.65 + 42 =
  17. 17.34 + 55 =
  18. 18.86 + 56 =
  19. 19.74 + 34 =
  20. 20.41 + 87 =
  21. 21.86 + 34 =
  22. 22.38 + 38 =
  23. 23.54 + 31 =
  24. 24.86 + 33 =
  25. 25.42 + 24 =
  26. 26.63 + 88 =
  27. 27.57 + 64 =
  28. 28.41 + 64 =
  29. 29.73 + 33 =
  30. 30.45 + 77 =
  31. 31.42 + 51 =
  32. 32.59 + 12 =
  33. 33.67 + 71 =
  34. 34.22 + 77 =
  35. 35.30 + 47 =
  36. 36.54 + 41 =
  37. 37.23 + 72 =
  38. 38.76 + 14 =
  39. 39.40 + 37 =
  40. 40.70 + 71 =

Answer key

  1. 116
  2. 68
  3. 158
  4. 104
  5. 110
  6. 90
  7. 83
  8. 82
  9. 93
  10. 132
  11. 98
  12. 77
  13. 125
  14. 123
  15. 131
  16. 107
  17. 89
  18. 142
  19. 108
  20. 128
  21. 120
  22. 76
  23. 85
  24. 119
  25. 66
  26. 151
  27. 121
  28. 105
  29. 106
  30. 122
  31. 93
  32. 71
  33. 138
  34. 99
  35. 77
  36. 95
  37. 95
  38. 90
  39. 77
  40. 141

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