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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 293 · 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. 1.57 × 4 =
  2. 2.16 × 4 =
  3. 3.16 × 8 =
  4. 4.35 × 8 =
  5. 5.13 × 4 =
  6. 6.33 × 4 =
  7. 7.27 × 8 =
  8. 8.18 × 4 =
  9. 9.21 × 8 =
  10. 10.72 × 4 =
  11. 11.19 × 8 =
  12. 12.68 × 4 =
  13. 13.38 × 4 =
  14. 14.69 × 4 =
  15. 15.20 × 8 =
  16. 16.32 × 8 =
  17. 17.12 × 8 =
  18. 18.37 × 8 =
  19. 19.14 × 4 =
  20. 20.22 × 4 =
  21. 21.39 × 8 =
  22. 22.23 × 8 =
  23. 23.22 × 8 =
  24. 24.70 × 4 =
  25. 25.17 × 8 =
  26. 26.65 × 4 =
  27. 27.40 × 4 =
  28. 28.28 × 4 =
  29. 29.33 × 8 =
  30. 30.39 × 4 =
  31. 31.17 × 4 =
  32. 32.28 × 8 =
  33. 33.14 × 8 =
  34. 34.15 × 8 =
  35. 35.55 × 4 =
  36. 36.19 × 4 =
  37. 37.25 × 8 =
  38. 38.51 × 4 =
  39. 39.48 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 228
  2. 64
  3. 128
  4. 280
  5. 52
  6. 132
  7. 216
  8. 72
  9. 168
  10. 288
  11. 152
  12. 272
  13. 152
  14. 276
  15. 160
  16. 256
  17. 96
  18. 296
  19. 56
  20. 88
  21. 312
  22. 184
  23. 176
  24. 280
  25. 136
  26. 260
  27. 160
  28. 112
  29. 264
  30. 156
  31. 68
  32. 224
  33. 112
  34. 120
  35. 220
  36. 76
  37. 200
  38. 204
  39. 192
  40. 216

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