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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 197 · 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. 1.51 × 4 =
  2. 2.29 × 4 =
  3. 3.32 × 4 =
  4. 4.24 × 8 =
  5. 5.16 × 8 =
  6. 6.39 × 8 =
  7. 7.58 × 4 =
  8. 8.39 × 4 =
  9. 9.59 × 4 =
  10. 10.15 × 4 =
  11. 11.30 × 4 =
  12. 12.35 × 4 =
  13. 13.56 × 4 =
  14. 14.30 × 8 =
  15. 15.60 × 4 =
  16. 16.19 × 4 =
  17. 17.29 × 8 =
  18. 18.23 × 8 =
  19. 19.26 × 8 =
  20. 20.24 × 4 =
  21. 21.14 × 8 =
  22. 22.74 × 4 =
  23. 23.44 × 4 =
  24. 24.20 × 8 =
  25. 25.15 × 8 =
  26. 26.22 × 8 =
  27. 27.34 × 8 =
  28. 28.20 × 4 =
  29. 29.40 × 4 =
  30. 30.17 × 8 =
  31. 31.52 × 4 =
  32. 32.61 × 4 =
  33. 33.35 × 8 =
  34. 34.55 × 4 =
  35. 35.31 × 8 =
  36. 36.67 × 4 =
  37. 37.34 × 4 =
  38. 38.19 × 8 =
  39. 39.57 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 204
  2. 116
  3. 128
  4. 192
  5. 128
  6. 312
  7. 232
  8. 156
  9. 236
  10. 60
  11. 120
  12. 140
  13. 224
  14. 240
  15. 240
  16. 76
  17. 232
  18. 184
  19. 208
  20. 96
  21. 112
  22. 296
  23. 176
  24. 160
  25. 120
  26. 176
  27. 272
  28. 80
  29. 160
  30. 136
  31. 208
  32. 244
  33. 280
  34. 220
  35. 248
  36. 268
  37. 136
  38. 152
  39. 228
  40. 108

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