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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 88 · 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. 1.33 × 8 =
  2. 2.14 × 8 =
  3. 3.39 × 8 =
  4. 4.20 × 8 =
  5. 5.34 × 8 =
  6. 6.19 × 8 =
  7. 7.37 × 8 =
  8. 8.29 × 8 =
  9. 9.34 × 4 =
  10. 10.22 × 8 =
  11. 11.38 × 4 =
  12. 12.31 × 4 =
  13. 13.42 × 4 =
  14. 14.68 × 4 =
  15. 15.16 × 4 =
  16. 16.27 × 8 =
  17. 17.53 × 4 =
  18. 18.29 × 4 =
  19. 19.17 × 8 =
  20. 20.15 × 8 =
  21. 21.57 × 4 =
  22. 22.27 × 4 =
  23. 23.16 × 8 =
  24. 24.51 × 4 =
  25. 25.74 × 4 =
  26. 26.28 × 4 =
  27. 27.61 × 4 =
  28. 28.72 × 4 =
  29. 29.37 × 4 =
  30. 30.62 × 4 =
  31. 31.13 × 8 =
  32. 32.43 × 4 =
  33. 33.28 × 8 =
  34. 34.54 × 4 =
  35. 35.21 × 8 =
  36. 36.65 × 4 =
  37. 37.59 × 4 =
  38. 38.18 × 8 =
  39. 39.12 × 8 =
  40. 40.26 × 4 =

Answer key

  1. 264
  2. 112
  3. 312
  4. 160
  5. 272
  6. 152
  7. 296
  8. 232
  9. 136
  10. 176
  11. 152
  12. 124
  13. 168
  14. 272
  15. 64
  16. 216
  17. 212
  18. 116
  19. 136
  20. 120
  21. 228
  22. 108
  23. 128
  24. 204
  25. 296
  26. 112
  27. 244
  28. 288
  29. 148
  30. 248
  31. 104
  32. 172
  33. 224
  34. 216
  35. 168
  36. 260
  37. 236
  38. 144
  39. 96
  40. 104

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