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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 688 · 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. 1.12 × 8 =
  2. 2.32 × 8 =
  3. 3.26 × 4 =
  4. 4.40 × 8 =
  5. 5.16 × 8 =
  6. 6.15 × 4 =
  7. 7.20 × 8 =
  8. 8.38 × 8 =
  9. 9.61 × 4 =
  10. 10.35 × 4 =
  11. 11.27 × 4 =
  12. 12.39 × 8 =
  13. 13.74 × 4 =
  14. 14.18 × 4 =
  15. 15.59 × 4 =
  16. 16.43 × 4 =
  17. 17.33 × 4 =
  18. 18.28 × 8 =
  19. 19.18 × 8 =
  20. 20.19 × 4 =
  21. 21.55 × 4 =
  22. 22.15 × 8 =
  23. 23.34 × 8 =
  24. 24.29 × 4 =
  25. 25.63 × 4 =
  26. 26.28 × 4 =
  27. 27.50 × 4 =
  28. 28.19 × 8 =
  29. 29.17 × 4 =
  30. 30.53 × 4 =
  31. 31.31 × 8 =
  32. 32.27 × 8 =
  33. 33.21 × 8 =
  34. 34.37 × 8 =
  35. 35.24 × 8 =
  36. 36.13 × 4 =
  37. 37.67 × 4 =
  38. 38.47 × 4 =
  39. 39.56 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 96
  2. 256
  3. 104
  4. 320
  5. 128
  6. 60
  7. 160
  8. 304
  9. 244
  10. 140
  11. 108
  12. 312
  13. 296
  14. 72
  15. 236
  16. 172
  17. 132
  18. 224
  19. 144
  20. 76
  21. 220
  22. 120
  23. 272
  24. 116
  25. 252
  26. 112
  27. 200
  28. 152
  29. 68
  30. 212
  31. 248
  32. 216
  33. 168
  34. 296
  35. 192
  36. 52
  37. 268
  38. 188
  39. 224
  40. 48

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