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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 228 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.40 × 8 =
  2. 2.27 × 4 =
  3. 3.34 × 8 =
  4. 4.35 × 4 =
  5. 5.33 × 4 =
  6. 6.14 × 8 =
  7. 7.39 × 8 =
  8. 8.53 × 4 =
  9. 9.30 × 4 =
  10. 10.25 × 8 =
  11. 11.12 × 4 =
  12. 12.26 × 8 =
  13. 13.18 × 8 =
  14. 14.54 × 4 =
  15. 15.19 × 4 =
  16. 16.13 × 8 =
  17. 17.16 × 8 =
  18. 18.15 × 8 =
  19. 19.21 × 4 =
  20. 20.15 × 4 =
  21. 21.30 × 8 =
  22. 22.23 × 8 =
  23. 23.22 × 8 =
  24. 24.38 × 4 =
  25. 25.21 × 8 =
  26. 26.32 × 8 =
  27. 27.18 × 4 =
  28. 28.32 × 4 =
  29. 29.65 × 4 =
  30. 30.35 × 8 =
  31. 31.28 × 4 =
  32. 32.55 × 4 =
  33. 33.59 × 4 =
  34. 34.72 × 4 =
  35. 35.33 × 8 =
  36. 36.37 × 8 =
  37. 37.28 × 8 =
  38. 38.19 × 8 =
  39. 39.60 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 320
  2. 108
  3. 272
  4. 140
  5. 132
  6. 112
  7. 312
  8. 212
  9. 120
  10. 200
  11. 48
  12. 208
  13. 144
  14. 216
  15. 76
  16. 104
  17. 128
  18. 120
  19. 84
  20. 60
  21. 240
  22. 184
  23. 176
  24. 152
  25. 168
  26. 256
  27. 72
  28. 128
  29. 260
  30. 280
  31. 112
  32. 220
  33. 236
  34. 288
  35. 264
  36. 296
  37. 224
  38. 152
  39. 240
  40. 192

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