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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 308 · 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. 1.36 × 8 =
  2. 2.21 × 8 =
  3. 3.38 × 8 =
  4. 4.30 × 4 =
  5. 5.24 × 8 =
  6. 6.74 × 4 =
  7. 7.15 × 8 =
  8. 8.41 × 4 =
  9. 9.65 × 4 =
  10. 10.12 × 4 =
  11. 11.16 × 8 =
  12. 12.38 × 4 =
  13. 13.14 × 8 =
  14. 14.20 × 8 =
  15. 15.12 × 8 =
  16. 16.30 × 8 =
  17. 17.35 × 4 =
  18. 18.53 × 4 =
  19. 19.35 × 8 =
  20. 20.44 × 4 =
  21. 21.23 × 4 =
  22. 22.16 × 4 =
  23. 23.34 × 8 =
  24. 24.46 × 4 =
  25. 25.66 × 4 =
  26. 26.28 × 4 =
  27. 27.29 × 4 =
  28. 28.17 × 4 =
  29. 29.37 × 8 =
  30. 30.72 × 4 =
  31. 31.73 × 4 =
  32. 32.19 × 4 =
  33. 33.50 × 4 =
  34. 34.14 × 4 =
  35. 35.60 × 4 =
  36. 36.31 × 8 =
  37. 37.36 × 4 =
  38. 38.33 × 8 =
  39. 39.31 × 4 =
  40. 40.15 × 4 =

Answer key

  1. 288
  2. 168
  3. 304
  4. 120
  5. 192
  6. 296
  7. 120
  8. 164
  9. 260
  10. 48
  11. 128
  12. 152
  13. 112
  14. 160
  15. 96
  16. 240
  17. 140
  18. 212
  19. 280
  20. 176
  21. 92
  22. 64
  23. 272
  24. 184
  25. 264
  26. 112
  27. 116
  28. 68
  29. 296
  30. 288
  31. 292
  32. 76
  33. 200
  34. 56
  35. 240
  36. 248
  37. 144
  38. 264
  39. 124
  40. 60

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