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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 700 · 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. 1.35 × 8 =
  2. 2.25 × 8 =
  3. 3.34 × 4 =
  4. 4.62 × 4 =
  5. 5.72 × 4 =
  6. 6.69 × 4 =
  7. 7.24 × 4 =
  8. 8.32 × 8 =
  9. 9.16 × 8 =
  10. 10.47 × 4 =
  11. 11.55 × 4 =
  12. 12.63 × 4 =
  13. 13.65 × 4 =
  14. 14.30 × 8 =
  15. 15.73 × 4 =
  16. 16.13 × 8 =
  17. 17.20 × 8 =
  18. 18.12 × 8 =
  19. 19.34 × 8 =
  20. 20.15 × 8 =
  21. 21.27 × 8 =
  22. 22.29 × 8 =
  23. 23.28 × 8 =
  24. 24.46 × 4 =
  25. 25.26 × 8 =
  26. 26.20 × 4 =
  27. 27.16 × 4 =
  28. 28.27 × 4 =
  29. 29.14 × 8 =
  30. 30.68 × 4 =
  31. 31.44 × 4 =
  32. 32.74 × 4 =
  33. 33.18 × 4 =
  34. 34.41 × 4 =
  35. 35.28 × 4 =
  36. 36.18 × 8 =
  37. 37.33 × 4 =
  38. 38.17 × 4 =
  39. 39.29 × 4 =
  40. 40.53 × 4 =

Answer key

  1. 280
  2. 200
  3. 136
  4. 248
  5. 288
  6. 276
  7. 96
  8. 256
  9. 128
  10. 188
  11. 220
  12. 252
  13. 260
  14. 240
  15. 292
  16. 104
  17. 160
  18. 96
  19. 272
  20. 120
  21. 216
  22. 232
  23. 224
  24. 184
  25. 208
  26. 80
  27. 64
  28. 108
  29. 112
  30. 272
  31. 176
  32. 296
  33. 72
  34. 164
  35. 112
  36. 144
  37. 132
  38. 68
  39. 116
  40. 212

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