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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 556 · 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. 1.35 × 4 =
  2. 2.18 × 4 =
  3. 3.69 × 4 =
  4. 4.22 × 8 =
  5. 5.15 × 8 =
  6. 6.28 × 8 =
  7. 7.33 × 8 =
  8. 8.19 × 8 =
  9. 9.33 × 4 =
  10. 10.29 × 8 =
  11. 11.16 × 4 =
  12. 12.67 × 4 =
  13. 13.52 × 4 =
  14. 14.30 × 4 =
  15. 15.24 × 8 =
  16. 16.38 × 8 =
  17. 17.62 × 4 =
  18. 18.14 × 4 =
  19. 19.20 × 4 =
  20. 20.44 × 4 =
  21. 21.28 × 4 =
  22. 22.15 × 4 =
  23. 23.37 × 4 =
  24. 24.25 × 4 =
  25. 25.12 × 4 =
  26. 26.61 × 4 =
  27. 27.12 × 8 =
  28. 28.23 × 8 =
  29. 29.65 × 4 =
  30. 30.37 × 8 =
  31. 31.47 × 4 =
  32. 32.16 × 8 =
  33. 33.21 × 4 =
  34. 34.13 × 8 =
  35. 35.68 × 4 =
  36. 36.43 × 4 =
  37. 37.14 × 8 =
  38. 38.35 × 8 =
  39. 39.40 × 4 =
  40. 40.64 × 4 =

Answer key

  1. 140
  2. 72
  3. 276
  4. 176
  5. 120
  6. 224
  7. 264
  8. 152
  9. 132
  10. 232
  11. 64
  12. 268
  13. 208
  14. 120
  15. 192
  16. 304
  17. 248
  18. 56
  19. 80
  20. 176
  21. 112
  22. 60
  23. 148
  24. 100
  25. 48
  26. 244
  27. 96
  28. 184
  29. 260
  30. 296
  31. 188
  32. 128
  33. 84
  34. 104
  35. 272
  36. 172
  37. 112
  38. 280
  39. 160
  40. 256

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