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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 836 · 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. 1.18 × 8 =
  2. 2.59 × 4 =
  3. 3.12 × 8 =
  4. 4.34 × 8 =
  5. 5.74 × 4 =
  6. 6.66 × 4 =
  7. 7.33 × 8 =
  8. 8.70 × 4 =
  9. 9.21 × 8 =
  10. 10.53 × 4 =
  11. 11.24 × 8 =
  12. 12.51 × 4 =
  13. 13.25 × 4 =
  14. 14.19 × 4 =
  15. 15.15 × 8 =
  16. 16.57 × 4 =
  17. 17.43 × 4 =
  18. 18.58 × 4 =
  19. 19.28 × 8 =
  20. 20.20 × 8 =
  21. 21.37 × 8 =
  22. 22.67 × 4 =
  23. 23.16 × 4 =
  24. 24.30 × 4 =
  25. 25.65 × 4 =
  26. 26.35 × 8 =
  27. 27.39 × 8 =
  28. 28.27 × 8 =
  29. 29.23 × 4 =
  30. 30.17 × 8 =
  31. 31.22 × 8 =
  32. 32.49 × 4 =
  33. 33.40 × 8 =
  34. 34.14 × 4 =
  35. 35.32 × 8 =
  36. 36.46 × 4 =
  37. 37.38 × 8 =
  38. 38.20 × 4 =
  39. 39.18 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 144
  2. 236
  3. 96
  4. 272
  5. 296
  6. 264
  7. 264
  8. 280
  9. 168
  10. 212
  11. 192
  12. 204
  13. 100
  14. 76
  15. 120
  16. 228
  17. 172
  18. 232
  19. 224
  20. 160
  21. 296
  22. 268
  23. 64
  24. 120
  25. 260
  26. 280
  27. 312
  28. 216
  29. 92
  30. 136
  31. 176
  32. 196
  33. 320
  34. 56
  35. 256
  36. 184
  37. 304
  38. 80
  39. 72
  40. 232

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