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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 17 · 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. 1.17 × 8 =
  2. 2.36 × 8 =
  3. 3.62 × 4 =
  4. 4.29 × 8 =
  5. 5.26 × 8 =
  6. 6.57 × 4 =
  7. 7.33 × 8 =
  8. 8.64 × 4 =
  9. 9.21 × 4 =
  10. 10.65 × 4 =
  11. 11.35 × 4 =
  12. 12.18 × 8 =
  13. 13.75 × 4 =
  14. 14.45 × 4 =
  15. 15.38 × 4 =
  16. 16.47 × 4 =
  17. 17.67 × 4 =
  18. 18.15 × 8 =
  19. 19.17 × 4 =
  20. 20.13 × 8 =
  21. 21.23 × 4 =
  22. 22.14 × 8 =
  23. 23.40 × 8 =
  24. 24.29 × 4 =
  25. 25.60 × 4 =
  26. 26.14 × 4 =
  27. 27.56 × 4 =
  28. 28.23 × 8 =
  29. 29.48 × 4 =
  30. 30.19 × 4 =
  31. 31.38 × 8 =
  32. 32.54 × 4 =
  33. 33.35 × 8 =
  34. 34.39 × 8 =
  35. 35.66 × 4 =
  36. 36.12 × 8 =
  37. 37.73 × 4 =
  38. 38.13 × 4 =
  39. 39.68 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 136
  2. 288
  3. 248
  4. 232
  5. 208
  6. 228
  7. 264
  8. 256
  9. 84
  10. 260
  11. 140
  12. 144
  13. 300
  14. 180
  15. 152
  16. 188
  17. 268
  18. 120
  19. 68
  20. 104
  21. 92
  22. 112
  23. 320
  24. 116
  25. 240
  26. 56
  27. 224
  28. 184
  29. 192
  30. 76
  31. 304
  32. 216
  33. 280
  34. 312
  35. 264
  36. 96
  37. 292
  38. 52
  39. 272
  40. 224

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