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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 394 · 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. 1.23 × 8 =
  2. 2.18 × 8 =
  3. 3.31 × 8 =
  4. 4.22 × 4 =
  5. 5.59 × 4 =
  6. 6.26 × 8 =
  7. 7.16 × 8 =
  8. 8.50 × 4 =
  9. 9.30 × 8 =
  10. 10.35 × 8 =
  11. 11.70 × 4 =
  12. 12.28 × 8 =
  13. 13.21 × 8 =
  14. 14.12 × 8 =
  15. 15.31 × 4 =
  16. 16.24 × 8 =
  17. 17.39 × 8 =
  18. 18.12 × 4 =
  19. 19.34 × 8 =
  20. 20.36 × 8 =
  21. 21.16 × 4 =
  22. 22.14 × 8 =
  23. 23.24 × 4 =
  24. 24.32 × 8 =
  25. 25.27 × 8 =
  26. 26.64 × 4 =
  27. 27.61 × 4 =
  28. 28.33 × 8 =
  29. 29.44 × 4 =
  30. 30.68 × 4 =
  31. 31.60 × 4 =
  32. 32.19 × 4 =
  33. 33.19 × 8 =
  34. 34.40 × 8 =
  35. 35.13 × 4 =
  36. 36.39 × 4 =
  37. 37.37 × 8 =
  38. 38.20 × 8 =
  39. 39.15 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 184
  2. 144
  3. 248
  4. 88
  5. 236
  6. 208
  7. 128
  8. 200
  9. 240
  10. 280
  11. 280
  12. 224
  13. 168
  14. 96
  15. 124
  16. 192
  17. 312
  18. 48
  19. 272
  20. 288
  21. 64
  22. 112
  23. 96
  24. 256
  25. 216
  26. 256
  27. 244
  28. 264
  29. 176
  30. 272
  31. 240
  32. 76
  33. 152
  34. 320
  35. 52
  36. 156
  37. 296
  38. 160
  39. 120
  40. 292

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