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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 496 · 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. 1.37 × 8 =
  2. 2.34 × 8 =
  3. 3.18 × 8 =
  4. 4.12 × 4 =
  5. 5.19 × 8 =
  6. 6.53 × 4 =
  7. 7.29 × 8 =
  8. 8.31 × 8 =
  9. 9.37 × 4 =
  10. 10.27 × 8 =
  11. 11.20 × 8 =
  12. 12.22 × 8 =
  13. 13.62 × 4 =
  14. 14.68 × 4 =
  15. 15.13 × 4 =
  16. 16.31 × 4 =
  17. 17.25 × 8 =
  18. 18.16 × 4 =
  19. 19.60 × 4 =
  20. 20.15 × 8 =
  21. 21.33 × 8 =
  22. 22.32 × 4 =
  23. 23.48 × 4 =
  24. 24.49 × 4 =
  25. 25.13 × 8 =
  26. 26.65 × 4 =
  27. 27.51 × 4 =
  28. 28.24 × 8 =
  29. 29.36 × 4 =
  30. 30.17 × 8 =
  31. 31.26 × 8 =
  32. 32.35 × 4 =
  33. 33.28 × 4 =
  34. 34.71 × 4 =
  35. 35.54 × 4 =
  36. 36.28 × 8 =
  37. 37.19 × 4 =
  38. 38.39 × 8 =
  39. 39.42 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 296
  2. 272
  3. 144
  4. 48
  5. 152
  6. 212
  7. 232
  8. 248
  9. 148
  10. 216
  11. 160
  12. 176
  13. 248
  14. 272
  15. 52
  16. 124
  17. 200
  18. 64
  19. 240
  20. 120
  21. 264
  22. 128
  23. 192
  24. 196
  25. 104
  26. 260
  27. 204
  28. 192
  29. 144
  30. 136
  31. 208
  32. 140
  33. 112
  34. 284
  35. 216
  36. 224
  37. 76
  38. 312
  39. 168
  40. 100

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