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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 359 · 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. 1.21 × 4 =
  2. 2.36 × 8 =
  3. 3.27 × 8 =
  4. 4.16 × 8 =
  5. 5.38 × 8 =
  6. 6.70 × 4 =
  7. 7.37 × 8 =
  8. 8.24 × 8 =
  9. 9.37 × 4 =
  10. 10.17 × 4 =
  11. 11.64 × 4 =
  12. 12.63 × 4 =
  13. 13.44 × 4 =
  14. 14.19 × 4 =
  15. 15.18 × 8 =
  16. 16.25 × 8 =
  17. 17.31 × 8 =
  18. 18.54 × 4 =
  19. 19.16 × 4 =
  20. 20.14 × 8 =
  21. 21.35 × 8 =
  22. 22.65 × 4 =
  23. 23.46 × 4 =
  24. 24.29 × 4 =
  25. 25.12 × 8 =
  26. 26.61 × 4 =
  27. 27.26 × 4 =
  28. 28.23 × 8 =
  29. 29.27 × 4 =
  30. 30.28 × 8 =
  31. 31.15 × 8 =
  32. 32.72 × 4 =
  33. 33.58 × 4 =
  34. 34.43 × 4 =
  35. 35.60 × 4 =
  36. 36.13 × 8 =
  37. 37.56 × 4 =
  38. 38.69 × 4 =
  39. 39.32 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 84
  2. 288
  3. 216
  4. 128
  5. 304
  6. 280
  7. 296
  8. 192
  9. 148
  10. 68
  11. 256
  12. 252
  13. 176
  14. 76
  15. 144
  16. 200
  17. 248
  18. 216
  19. 64
  20. 112
  21. 280
  22. 260
  23. 184
  24. 116
  25. 96
  26. 244
  27. 104
  28. 184
  29. 108
  30. 224
  31. 120
  32. 288
  33. 232
  34. 172
  35. 240
  36. 104
  37. 224
  38. 276
  39. 128
  40. 240

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