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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 200 · 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. 1.39 × 8 =
  2. 2.52 × 4 =
  3. 3.34 × 4 =
  4. 4.38 × 8 =
  5. 5.33 × 8 =
  6. 6.16 × 8 =
  7. 7.17 × 8 =
  8. 8.55 × 4 =
  9. 9.20 × 8 =
  10. 10.13 × 8 =
  11. 11.12 × 4 =
  12. 12.73 × 4 =
  13. 13.12 × 8 =
  14. 14.16 × 4 =
  15. 15.21 × 4 =
  16. 16.42 × 4 =
  17. 17.40 × 8 =
  18. 18.24 × 4 =
  19. 19.15 × 8 =
  20. 20.37 × 8 =
  21. 21.14 × 8 =
  22. 22.22 × 8 =
  23. 23.27 × 8 =
  24. 24.68 × 4 =
  25. 25.70 × 4 =
  26. 26.36 × 8 =
  27. 27.50 × 4 =
  28. 28.29 × 8 =
  29. 29.65 × 4 =
  30. 30.34 × 8 =
  31. 31.72 × 4 =
  32. 32.41 × 4 =
  33. 33.62 × 4 =
  34. 34.35 × 4 =
  35. 35.67 × 4 =
  36. 36.17 × 4 =
  37. 37.19 × 4 =
  38. 38.29 × 4 =
  39. 39.30 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 312
  2. 208
  3. 136
  4. 304
  5. 264
  6. 128
  7. 136
  8. 220
  9. 160
  10. 104
  11. 48
  12. 292
  13. 96
  14. 64
  15. 84
  16. 168
  17. 320
  18. 96
  19. 120
  20. 296
  21. 112
  22. 176
  23. 216
  24. 272
  25. 280
  26. 288
  27. 200
  28. 232
  29. 260
  30. 272
  31. 288
  32. 164
  33. 248
  34. 140
  35. 268
  36. 68
  37. 76
  38. 116
  39. 120
  40. 148

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