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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 23 · 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. 1.15 × 4 =
  2. 2.70 × 4 =
  3. 3.28 × 4 =
  4. 4.59 × 4 =
  5. 5.63 × 4 =
  6. 6.71 × 4 =
  7. 7.15 × 8 =
  8. 8.31 × 8 =
  9. 9.25 × 8 =
  10. 10.28 × 8 =
  11. 11.12 × 8 =
  12. 12.61 × 4 =
  13. 13.45 × 4 =
  14. 14.32 × 8 =
  15. 15.50 × 4 =
  16. 16.40 × 4 =
  17. 17.30 × 8 =
  18. 18.21 × 8 =
  19. 19.12 × 4 =
  20. 20.48 × 4 =
  21. 21.39 × 4 =
  22. 22.72 × 4 =
  23. 23.16 × 8 =
  24. 24.20 × 8 =
  25. 25.32 × 4 =
  26. 26.55 × 4 =
  27. 27.14 × 4 =
  28. 28.73 × 4 =
  29. 29.65 × 4 =
  30. 30.38 × 8 =
  31. 31.40 × 8 =
  32. 32.17 × 8 =
  33. 33.18 × 8 =
  34. 34.39 × 8 =
  35. 35.24 × 8 =
  36. 36.19 × 8 =
  37. 37.33 × 4 =
  38. 38.53 × 4 =
  39. 39.14 × 8 =
  40. 40.33 × 8 =

Answer key

  1. 60
  2. 280
  3. 112
  4. 236
  5. 252
  6. 284
  7. 120
  8. 248
  9. 200
  10. 224
  11. 96
  12. 244
  13. 180
  14. 256
  15. 200
  16. 160
  17. 240
  18. 168
  19. 48
  20. 192
  21. 156
  22. 288
  23. 128
  24. 160
  25. 128
  26. 220
  27. 56
  28. 292
  29. 260
  30. 304
  31. 320
  32. 136
  33. 144
  34. 312
  35. 192
  36. 152
  37. 132
  38. 212
  39. 112
  40. 264

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