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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 159 · 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. 1.27 × 8 =
  2. 2.43 × 4 =
  3. 3.22 × 8 =
  4. 4.18 × 8 =
  5. 5.55 × 4 =
  6. 6.64 × 4 =
  7. 7.14 × 4 =
  8. 8.40 × 4 =
  9. 9.68 × 4 =
  10. 10.73 × 4 =
  11. 11.37 × 8 =
  12. 12.72 × 4 =
  13. 13.36 × 8 =
  14. 14.56 × 4 =
  15. 15.35 × 8 =
  16. 16.26 × 4 =
  17. 17.69 × 4 =
  18. 18.14 × 8 =
  19. 19.15 × 8 =
  20. 20.40 × 8 =
  21. 21.60 × 4 =
  22. 22.39 × 4 =
  23. 23.33 × 8 =
  24. 24.19 × 4 =
  25. 25.20 × 8 =
  26. 26.21 × 4 =
  27. 27.19 × 8 =
  28. 28.59 × 4 =
  29. 29.23 × 8 =
  30. 30.46 × 4 =
  31. 31.22 × 4 =
  32. 32.32 × 8 =
  33. 33.31 × 8 =
  34. 34.65 × 4 =
  35. 35.42 × 4 =
  36. 36.48 × 4 =
  37. 37.29 × 4 =
  38. 38.23 × 4 =
  39. 39.21 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 216
  2. 172
  3. 176
  4. 144
  5. 220
  6. 256
  7. 56
  8. 160
  9. 272
  10. 292
  11. 296
  12. 288
  13. 288
  14. 224
  15. 280
  16. 104
  17. 276
  18. 112
  19. 120
  20. 320
  21. 240
  22. 156
  23. 264
  24. 76
  25. 160
  26. 84
  27. 152
  28. 236
  29. 184
  30. 184
  31. 88
  32. 256
  33. 248
  34. 260
  35. 168
  36. 192
  37. 116
  38. 92
  39. 168
  40. 284

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