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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 745 · 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. 1.58 + 58 =
  2. 2.66 + 34 =
  3. 3.46 + 39 =
  4. 4.47 + 79 =
  5. 5.85 + 23 =
  6. 6.69 + 37 =
  7. 7.56 + 66 =
  8. 8.44 + 67 =
  9. 9.40 + 72 =
  10. 10.48 + 18 =
  11. 11.67 + 72 =
  12. 12.34 + 45 =
  13. 13.51 + 45 =
  14. 14.28 + 13 =
  15. 15.33 + 48 =
  16. 16.71 + 65 =
  17. 17.52 + 23 =
  18. 18.22 + 64 =
  19. 19.61 + 15 =
  20. 20.37 + 44 =
  21. 21.25 + 74 =
  22. 22.36 + 15 =
  23. 23.78 + 87 =
  24. 24.60 + 57 =
  25. 25.58 + 13 =
  26. 26.83 + 35 =
  27. 27.74 + 52 =
  28. 28.43 + 61 =
  29. 29.79 + 49 =
  30. 30.63 + 89 =
  31. 31.28 + 53 =
  32. 32.43 + 58 =
  33. 33.34 + 75 =
  34. 34.51 + 37 =
  35. 35.72 + 86 =
  36. 36.88 + 27 =
  37. 37.28 + 35 =
  38. 38.21 + 68 =
  39. 39.23 + 21 =
  40. 40.73 + 47 =

Answer key

  1. 116
  2. 100
  3. 85
  4. 126
  5. 108
  6. 106
  7. 122
  8. 111
  9. 112
  10. 66
  11. 139
  12. 79
  13. 96
  14. 41
  15. 81
  16. 136
  17. 75
  18. 86
  19. 76
  20. 81
  21. 99
  22. 51
  23. 165
  24. 117
  25. 71
  26. 118
  27. 126
  28. 104
  29. 128
  30. 152
  31. 81
  32. 101
  33. 109
  34. 88
  35. 158
  36. 115
  37. 63
  38. 89
  39. 44
  40. 120

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