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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 312 · 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. 1.46 + 39 =
  2. 2.67 + 51 =
  3. 3.86 + 79 =
  4. 4.65 + 32 =
  5. 5.39 + 16 =
  6. 6.85 + 69 =
  7. 7.46 + 22 =
  8. 8.70 + 88 =
  9. 9.73 + 16 =
  10. 10.62 + 27 =
  11. 11.40 + 89 =
  12. 12.63 + 44 =
  13. 13.21 + 18 =
  14. 14.61 + 51 =
  15. 15.62 + 61 =
  16. 16.77 + 71 =
  17. 17.64 + 63 =
  18. 18.26 + 29 =
  19. 19.54 + 32 =
  20. 20.30 + 59 =
  21. 21.25 + 75 =
  22. 22.27 + 56 =
  23. 23.41 + 59 =
  24. 24.67 + 74 =
  25. 25.86 + 61 =
  26. 26.86 + 31 =
  27. 27.36 + 51 =
  28. 28.44 + 71 =
  29. 29.33 + 66 =
  30. 30.69 + 51 =
  31. 31.33 + 87 =
  32. 32.39 + 75 =
  33. 33.31 + 61 =
  34. 34.50 + 81 =
  35. 35.49 + 26 =
  36. 36.26 + 51 =
  37. 37.81 + 88 =
  38. 38.68 + 68 =
  39. 39.68 + 79 =
  40. 40.30 + 45 =

Answer key

  1. 85
  2. 118
  3. 165
  4. 97
  5. 55
  6. 154
  7. 68
  8. 158
  9. 89
  10. 89
  11. 129
  12. 107
  13. 39
  14. 112
  15. 123
  16. 148
  17. 127
  18. 55
  19. 86
  20. 89
  21. 100
  22. 83
  23. 100
  24. 141
  25. 147
  26. 117
  27. 87
  28. 115
  29. 99
  30. 120
  31. 120
  32. 114
  33. 92
  34. 131
  35. 75
  36. 77
  37. 169
  38. 136
  39. 147
  40. 75

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