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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 514 · 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. 1.18 × 8 =
  2. 2.56 × 4 =
  3. 3.18 × 4 =
  4. 4.23 × 8 =
  5. 5.19 × 4 =
  6. 6.12 × 8 =
  7. 7.17 × 4 =
  8. 8.31 × 4 =
  9. 9.15 × 4 =
  10. 10.22 × 8 =
  11. 11.26 × 8 =
  12. 12.47 × 4 =
  13. 13.71 × 4 =
  14. 14.37 × 8 =
  15. 15.49 × 4 =
  16. 16.53 × 4 =
  17. 17.25 × 8 =
  18. 18.16 × 4 =
  19. 19.65 × 4 =
  20. 20.45 × 4 =
  21. 21.33 × 8 =
  22. 22.13 × 8 =
  23. 23.20 × 8 =
  24. 24.35 × 4 =
  25. 25.12 × 4 =
  26. 26.40 × 8 =
  27. 27.66 × 4 =
  28. 28.36 × 8 =
  29. 29.19 × 8 =
  30. 30.32 × 8 =
  31. 31.55 × 4 =
  32. 32.60 × 4 =
  33. 33.59 × 4 =
  34. 34.29 × 4 =
  35. 35.29 × 8 =
  36. 36.27 × 4 =
  37. 37.46 × 4 =
  38. 38.21 × 8 =
  39. 39.35 × 8 =
  40. 40.57 × 4 =

Answer key

  1. 144
  2. 224
  3. 72
  4. 184
  5. 76
  6. 96
  7. 68
  8. 124
  9. 60
  10. 176
  11. 208
  12. 188
  13. 284
  14. 296
  15. 196
  16. 212
  17. 200
  18. 64
  19. 260
  20. 180
  21. 264
  22. 104
  23. 160
  24. 140
  25. 48
  26. 320
  27. 264
  28. 288
  29. 152
  30. 256
  31. 220
  32. 240
  33. 236
  34. 116
  35. 232
  36. 108
  37. 184
  38. 168
  39. 280
  40. 228

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