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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 670 · 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. 1.12 × 8 =
  2. 2.62 × 4 =
  3. 3.18 × 4 =
  4. 4.19 × 8 =
  5. 5.16 × 4 =
  6. 6.28 × 8 =
  7. 7.30 × 8 =
  8. 8.53 × 4 =
  9. 9.24 × 8 =
  10. 10.34 × 8 =
  11. 11.26 × 8 =
  12. 12.14 × 8 =
  13. 13.65 × 4 =
  14. 14.73 × 4 =
  15. 15.15 × 4 =
  16. 16.48 × 4 =
  17. 17.37 × 4 =
  18. 18.56 × 4 =
  19. 19.64 × 4 =
  20. 20.13 × 8 =
  21. 21.31 × 4 =
  22. 22.55 × 4 =
  23. 23.36 × 8 =
  24. 24.25 × 4 =
  25. 25.47 × 4 =
  26. 26.60 × 4 =
  27. 27.24 × 4 =
  28. 28.20 × 8 =
  29. 29.32 × 4 =
  30. 30.63 × 4 =
  31. 31.40 × 8 =
  32. 32.17 × 8 =
  33. 33.68 × 4 =
  34. 34.49 × 4 =
  35. 35.46 × 4 =
  36. 36.32 × 8 =
  37. 37.18 × 8 =
  38. 38.39 × 8 =
  39. 39.41 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 96
  2. 248
  3. 72
  4. 152
  5. 64
  6. 224
  7. 240
  8. 212
  9. 192
  10. 272
  11. 208
  12. 112
  13. 260
  14. 292
  15. 60
  16. 192
  17. 148
  18. 224
  19. 256
  20. 104
  21. 124
  22. 220
  23. 288
  24. 100
  25. 188
  26. 240
  27. 96
  28. 160
  29. 128
  30. 252
  31. 320
  32. 136
  33. 272
  34. 196
  35. 184
  36. 256
  37. 144
  38. 312
  39. 164
  40. 268

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