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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 724 · 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. 2.46 × 4 =
  3. 3.58 × 4 =
  4. 4.40 × 8 =
  5. 5.15 × 4 =
  6. 6.37 × 4 =
  7. 7.20 × 8 =
  8. 8.16 × 8 =
  9. 9.31 × 8 =
  10. 10.35 × 4 =
  11. 11.19 × 8 =
  12. 12.18 × 4 =
  13. 13.28 × 8 =
  14. 14.36 × 8 =
  15. 15.12 × 4 =
  16. 16.15 × 8 =
  17. 17.12 × 8 =
  18. 18.18 × 8 =
  19. 19.29 × 4 =
  20. 20.30 × 8 =
  21. 21.43 × 4 =
  22. 22.13 × 8 =
  23. 23.37 × 8 =
  24. 24.59 × 4 =
  25. 25.26 × 8 =
  26. 26.36 × 4 =
  27. 27.29 × 8 =
  28. 28.23 × 8 =
  29. 29.28 × 4 =
  30. 30.40 × 4 =
  31. 31.60 × 4 =
  32. 32.45 × 4 =
  33. 33.53 × 4 =
  34. 34.67 × 4 =
  35. 35.61 × 4 =
  36. 36.19 × 4 =
  37. 37.39 × 4 =
  38. 38.68 × 4 =
  39. 39.55 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 136
  2. 184
  3. 232
  4. 320
  5. 60
  6. 148
  7. 160
  8. 128
  9. 248
  10. 140
  11. 152
  12. 72
  13. 224
  14. 288
  15. 48
  16. 120
  17. 96
  18. 144
  19. 116
  20. 240
  21. 172
  22. 104
  23. 296
  24. 236
  25. 208
  26. 144
  27. 232
  28. 184
  29. 112
  30. 160
  31. 240
  32. 180
  33. 212
  34. 268
  35. 244
  36. 76
  37. 156
  38. 272
  39. 220
  40. 192

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