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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 9 · 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. 1.38 × 8 =
  2. 2.22 × 8 =
  3. 3.61 × 4 =
  4. 4.25 × 4 =
  5. 5.66 × 4 =
  6. 6.20 × 8 =
  7. 7.22 × 4 =
  8. 8.43 × 4 =
  9. 9.65 × 4 =
  10. 10.18 × 4 =
  11. 11.15 × 4 =
  12. 12.31 × 4 =
  13. 13.57 × 4 =
  14. 14.32 × 8 =
  15. 15.28 × 8 =
  16. 16.14 × 8 =
  17. 17.12 × 8 =
  18. 18.49 × 4 =
  19. 19.13 × 8 =
  20. 20.23 × 8 =
  21. 21.52 × 4 =
  22. 22.31 × 8 =
  23. 23.16 × 8 =
  24. 24.53 × 4 =
  25. 25.27 × 4 =
  26. 26.34 × 8 =
  27. 27.36 × 8 =
  28. 28.39 × 4 =
  29. 29.14 × 4 =
  30. 30.37 × 8 =
  31. 31.72 × 4 =
  32. 32.19 × 8 =
  33. 33.40 × 8 =
  34. 34.25 × 8 =
  35. 35.17 × 8 =
  36. 36.18 × 8 =
  37. 37.50 × 4 =
  38. 38.24 × 8 =
  39. 39.37 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 304
  2. 176
  3. 244
  4. 100
  5. 264
  6. 160
  7. 88
  8. 172
  9. 260
  10. 72
  11. 60
  12. 124
  13. 228
  14. 256
  15. 224
  16. 112
  17. 96
  18. 196
  19. 104
  20. 184
  21. 208
  22. 248
  23. 128
  24. 212
  25. 108
  26. 272
  27. 288
  28. 156
  29. 56
  30. 296
  31. 288
  32. 152
  33. 320
  34. 200
  35. 136
  36. 144
  37. 200
  38. 192
  39. 148
  40. 292

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