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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 436 · 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. 1.32 × 8 =
  2. 2.51 × 4 =
  3. 3.27 × 8 =
  4. 4.18 × 4 =
  5. 5.13 × 8 =
  6. 6.30 × 4 =
  7. 7.29 × 4 =
  8. 8.37 × 8 =
  9. 9.73 × 4 =
  10. 10.68 × 4 =
  11. 11.75 × 4 =
  12. 12.65 × 4 =
  13. 13.33 × 4 =
  14. 14.39 × 4 =
  15. 15.54 × 4 =
  16. 16.22 × 8 =
  17. 17.71 × 4 =
  18. 18.12 × 8 =
  19. 19.20 × 8 =
  20. 20.35 × 4 =
  21. 21.33 × 8 =
  22. 22.35 × 8 =
  23. 23.22 × 4 =
  24. 24.12 × 4 =
  25. 25.37 × 4 =
  26. 26.15 × 8 =
  27. 27.36 × 4 =
  28. 28.63 × 4 =
  29. 29.48 × 4 =
  30. 30.13 × 4 =
  31. 31.24 × 4 =
  32. 32.17 × 8 =
  33. 33.39 × 8 =
  34. 34.28 × 8 =
  35. 35.34 × 8 =
  36. 36.45 × 4 =
  37. 37.19 × 8 =
  38. 38.47 × 4 =
  39. 39.14 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 256
  2. 204
  3. 216
  4. 72
  5. 104
  6. 120
  7. 116
  8. 296
  9. 292
  10. 272
  11. 300
  12. 260
  13. 132
  14. 156
  15. 216
  16. 176
  17. 284
  18. 96
  19. 160
  20. 140
  21. 264
  22. 280
  23. 88
  24. 48
  25. 148
  26. 120
  27. 144
  28. 252
  29. 192
  30. 52
  31. 96
  32. 136
  33. 312
  34. 224
  35. 272
  36. 180
  37. 152
  38. 188
  39. 112
  40. 288

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