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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 696 · 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 × 4 =
  2. 2.63 × 4 =
  3. 3.21 × 4 =
  4. 4.19 × 8 =
  5. 5.16 × 8 =
  6. 6.22 × 8 =
  7. 7.20 × 8 =
  8. 8.29 × 8 =
  9. 9.54 × 4 =
  10. 10.35 × 8 =
  11. 11.17 × 4 =
  12. 12.33 × 8 =
  13. 13.28 × 8 =
  14. 14.21 × 8 =
  15. 15.13 × 8 =
  16. 16.60 × 4 =
  17. 17.36 × 8 =
  18. 18.57 × 4 =
  19. 19.30 × 4 =
  20. 20.22 × 4 =
  21. 21.56 × 4 =
  22. 22.15 × 8 =
  23. 23.18 × 8 =
  24. 24.27 × 4 =
  25. 25.23 × 8 =
  26. 26.37 × 8 =
  27. 27.13 × 4 =
  28. 28.32 × 8 =
  29. 29.59 × 4 =
  30. 30.25 × 8 =
  31. 31.55 × 4 =
  32. 32.27 × 8 =
  33. 33.72 × 4 =
  34. 34.74 × 4 =
  35. 35.30 × 8 =
  36. 36.18 × 4 =
  37. 37.67 × 4 =
  38. 38.17 × 8 =
  39. 39.12 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 48
  2. 252
  3. 84
  4. 152
  5. 128
  6. 176
  7. 160
  8. 232
  9. 216
  10. 280
  11. 68
  12. 264
  13. 224
  14. 168
  15. 104
  16. 240
  17. 288
  18. 228
  19. 120
  20. 88
  21. 224
  22. 120
  23. 144
  24. 108
  25. 184
  26. 296
  27. 52
  28. 256
  29. 236
  30. 200
  31. 220
  32. 216
  33. 288
  34. 296
  35. 240
  36. 72
  37. 268
  38. 136
  39. 96
  40. 320

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