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Adding +4 to sums of 20

Bruce Akitt Mathematics Grade 12 English 33 cards

Cards in this deck (33)

  1. 11 + 4 = ___1 + 4 = _5_
  2. 24 + 1 = ___4 + 1 = _5_
  3. 31 + ___ = 51 + _4_ = 5
  4. 4___ + 4 = 5_1_ + 4 = 5
  5. 52 + 4 = ___2 + 4 = _6_
  6. 64 + 2 = ___4 + 2 = _6_
  7. 72 + ___ = 62 + _4_ = 6
  8. 8___ + 4 = 6_2_ + 4 = 6
  9. 93 + 4 = ___3 + 4 = _7_
  10. 104 + 3 = ___4 + 3 = _7_
  11. 113 + ___ = 73 + _4_ = 7
  12. 12___ + 4 = 7_3_ + 4 = 7
  13. 134 + 4 = ___4 + 4 = _8_
  14. 14___ + 4 = 8_4_ + 4 = 8
  15. 154 + ___ = 84 + _4_ = 8
  16. 165 + 4 = ___5 + 4 = _9_
  17. 175 + ___ = 95 + _4_ = 9
  18. 186 + 4 = ___6 + 4 = _10_
  19. 196 + ___ = 106 + _4_ = 10
  20. 207 + 4 = ___7 + 4 = _11_
  21. 217 + ___ = 117 + _4_ = 11
  22. 228 + 4 = ___8 + 4 = _12_
  23. 238 + ___ = 128 + _4_ = 12
  24. 249 + 4 = ___9 + 4 = 13
  25. 259 + ___ = 139 + _4_ = 13
  26. 2610 + 4 = ___10 + 4 = _14_
  27. 2710 + ___ = 1410 + _4_ = 14
  28. 2811 + 4 = ___11 + 4 = 10 + 5 = _15_
  29. 2912 + 4 = ___12 + 4 = 10 + 6 = _16_
  30. 3013 + 4 = ___13 + 4 = 10 + 7 = _17_
  31. 3114 + 4 = ___14 + 4 = 10 + 8 = _18_
  32. 3215 + 4 = ___15 + 4 = 10 + 9 = _19_
  33. 3316 + 4 = ___16 + 4 = 10 + 10 = _20_

Information

Description
Developing immediate recall of all addition families to 10 + 4. Also practicing a rapid mental process to add +4 to a 2 digit number making a sum less than 20.
Created by
Bruce Akitt
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