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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 199 · 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. 1.72 + 88 =
  2. 2.28 + 61 =
  3. 3.74 + 78 =
  4. 4.74 + 81 =
  5. 5.48 + 67 =
  6. 6.54 + 71 =
  7. 7.53 + 61 =
  8. 8.46 + 78 =
  9. 9.70 + 82 =
  10. 10.51 + 77 =
  11. 11.62 + 86 =
  12. 12.36 + 31 =
  13. 13.47 + 22 =
  14. 14.27 + 68 =
  15. 15.55 + 71 =
  16. 16.81 + 74 =
  17. 17.66 + 51 =
  18. 18.35 + 63 =
  19. 19.35 + 21 =
  20. 20.62 + 64 =
  21. 21.84 + 65 =
  22. 22.40 + 78 =
  23. 23.84 + 85 =
  24. 24.40 + 83 =
  25. 25.47 + 26 =
  26. 26.46 + 71 =
  27. 27.50 + 33 =
  28. 28.68 + 64 =
  29. 29.87 + 17 =
  30. 30.85 + 17 =
  31. 31.62 + 23 =
  32. 32.46 + 72 =
  33. 33.24 + 31 =
  34. 34.64 + 32 =
  35. 35.25 + 89 =
  36. 36.63 + 55 =
  37. 37.21 + 37 =
  38. 38.58 + 15 =
  39. 39.25 + 23 =
  40. 40.52 + 84 =

Answer key

  1. 160
  2. 89
  3. 152
  4. 155
  5. 115
  6. 125
  7. 114
  8. 124
  9. 152
  10. 128
  11. 148
  12. 67
  13. 69
  14. 95
  15. 126
  16. 155
  17. 117
  18. 98
  19. 56
  20. 126
  21. 149
  22. 118
  23. 169
  24. 123
  25. 73
  26. 117
  27. 83
  28. 132
  29. 104
  30. 102
  31. 85
  32. 118
  33. 55
  34. 96
  35. 114
  36. 118
  37. 58
  38. 73
  39. 48
  40. 136

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