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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 298 · 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. 1.34 × 4 =
  2. 2.15 × 8 =
  3. 3.69 × 4 =
  4. 4.29 × 4 =
  5. 5.18 × 8 =
  6. 6.21 × 8 =
  7. 7.59 × 4 =
  8. 8.68 × 4 =
  9. 9.44 × 4 =
  10. 10.73 × 4 =
  11. 11.14 × 8 =
  12. 12.17 × 4 =
  13. 13.24 × 8 =
  14. 14.13 × 8 =
  15. 15.21 × 4 =
  16. 16.45 × 4 =
  17. 17.17 × 8 =
  18. 18.34 × 8 =
  19. 19.14 × 4 =
  20. 20.26 × 8 =
  21. 21.30 × 8 =
  22. 22.29 × 8 =
  23. 23.25 × 8 =
  24. 24.32 × 4 =
  25. 25.62 × 4 =
  26. 26.35 × 4 =
  27. 27.15 × 4 =
  28. 28.16 × 4 =
  29. 29.67 × 4 =
  30. 30.75 × 4 =
  31. 31.37 × 4 =
  32. 32.60 × 4 =
  33. 33.32 × 8 =
  34. 34.63 × 4 =
  35. 35.70 × 4 =
  36. 36.50 × 4 =
  37. 37.16 × 8 =
  38. 38.51 × 4 =
  39. 39.33 × 4 =
  40. 40.20 × 8 =

Answer key

  1. 136
  2. 120
  3. 276
  4. 116
  5. 144
  6. 168
  7. 236
  8. 272
  9. 176
  10. 292
  11. 112
  12. 68
  13. 192
  14. 104
  15. 84
  16. 180
  17. 136
  18. 272
  19. 56
  20. 208
  21. 240
  22. 232
  23. 200
  24. 128
  25. 248
  26. 140
  27. 60
  28. 64
  29. 268
  30. 300
  31. 148
  32. 240
  33. 256
  34. 252
  35. 280
  36. 200
  37. 128
  38. 204
  39. 132
  40. 160

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