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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 525 · 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. 1.26 × 8 =
  2. 2.63 × 4 =
  3. 3.16 × 4 =
  4. 4.13 × 8 =
  5. 5.42 × 4 =
  6. 6.72 × 4 =
  7. 7.28 × 8 =
  8. 8.45 × 4 =
  9. 9.24 × 4 =
  10. 10.31 × 8 =
  11. 11.36 × 8 =
  12. 12.43 × 4 =
  13. 13.19 × 4 =
  14. 14.68 × 4 =
  15. 15.56 × 4 =
  16. 16.17 × 8 =
  17. 17.60 × 4 =
  18. 18.67 × 4 =
  19. 19.14 × 8 =
  20. 20.12 × 4 =
  21. 21.25 × 8 =
  22. 22.65 × 4 =
  23. 23.37 × 8 =
  24. 24.21 × 8 =
  25. 25.22 × 4 =
  26. 26.24 × 8 =
  27. 27.31 × 4 =
  28. 28.53 × 4 =
  29. 29.46 × 4 =
  30. 30.44 × 4 =
  31. 31.34 × 8 =
  32. 32.30 × 8 =
  33. 33.27 × 4 =
  34. 34.27 × 8 =
  35. 35.50 × 4 =
  36. 36.74 × 4 =
  37. 37.66 × 4 =
  38. 38.57 × 4 =
  39. 39.25 × 4 =
  40. 40.38 × 8 =

Answer key

  1. 208
  2. 252
  3. 64
  4. 104
  5. 168
  6. 288
  7. 224
  8. 180
  9. 96
  10. 248
  11. 288
  12. 172
  13. 76
  14. 272
  15. 224
  16. 136
  17. 240
  18. 268
  19. 112
  20. 48
  21. 200
  22. 260
  23. 296
  24. 168
  25. 88
  26. 192
  27. 124
  28. 212
  29. 184
  30. 176
  31. 272
  32. 240
  33. 108
  34. 216
  35. 200
  36. 296
  37. 264
  38. 228
  39. 100
  40. 304

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