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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 35 · 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. 1.22 × 4 =
  2. 2.52 × 4 =
  3. 3.29 × 8 =
  4. 4.56 × 4 =
  5. 5.74 × 4 =
  6. 6.19 × 4 =
  7. 7.57 × 4 =
  8. 8.20 × 4 =
  9. 9.18 × 8 =
  10. 10.38 × 8 =
  11. 11.69 × 4 =
  12. 12.37 × 4 =
  13. 13.61 × 4 =
  14. 14.60 × 4 =
  15. 15.26 × 8 =
  16. 16.64 × 4 =
  17. 17.30 × 8 =
  18. 18.16 × 8 =
  19. 19.17 × 8 =
  20. 20.27 × 4 =
  21. 21.28 × 8 =
  22. 22.54 × 4 =
  23. 23.25 × 8 =
  24. 24.13 × 8 =
  25. 25.53 × 4 =
  26. 26.14 × 8 =
  27. 27.25 × 4 =
  28. 28.19 × 8 =
  29. 29.43 × 4 =
  30. 30.31 × 8 =
  31. 31.27 × 8 =
  32. 32.24 × 8 =
  33. 33.59 × 4 =
  34. 34.40 × 8 =
  35. 35.16 × 4 =
  36. 36.65 × 4 =
  37. 37.12 × 4 =
  38. 38.73 × 4 =
  39. 39.18 × 4 =
  40. 40.49 × 4 =

Answer key

  1. 88
  2. 208
  3. 232
  4. 224
  5. 296
  6. 76
  7. 228
  8. 80
  9. 144
  10. 304
  11. 276
  12. 148
  13. 244
  14. 240
  15. 208
  16. 256
  17. 240
  18. 128
  19. 136
  20. 108
  21. 224
  22. 216
  23. 200
  24. 104
  25. 212
  26. 112
  27. 100
  28. 152
  29. 172
  30. 248
  31. 216
  32. 192
  33. 236
  34. 320
  35. 64
  36. 260
  37. 48
  38. 292
  39. 72
  40. 196

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