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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 117 · 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. 1.35 × 8 =
  2. 2.26 × 8 =
  3. 3.72 × 4 =
  4. 4.29 × 4 =
  5. 5.39 × 4 =
  6. 6.27 × 8 =
  7. 7.23 × 4 =
  8. 8.32 × 8 =
  9. 9.18 × 8 =
  10. 10.15 × 4 =
  11. 11.50 × 4 =
  12. 12.74 × 4 =
  13. 13.19 × 4 =
  14. 14.43 × 4 =
  15. 15.42 × 4 =
  16. 16.14 × 4 =
  17. 17.71 × 4 =
  18. 18.16 × 8 =
  19. 19.33 × 4 =
  20. 20.23 × 8 =
  21. 21.21 × 8 =
  22. 22.60 × 4 =
  23. 23.56 × 4 =
  24. 24.65 × 4 =
  25. 25.13 × 8 =
  26. 26.13 × 4 =
  27. 27.28 × 4 =
  28. 28.19 × 8 =
  29. 29.32 × 4 =
  30. 30.20 × 8 =
  31. 31.39 × 8 =
  32. 32.12 × 4 =
  33. 33.44 × 4 =
  34. 34.36 × 8 =
  35. 35.52 × 4 =
  36. 36.55 × 4 =
  37. 37.54 × 4 =
  38. 38.47 × 4 =
  39. 39.62 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 280
  2. 208
  3. 288
  4. 116
  5. 156
  6. 216
  7. 92
  8. 256
  9. 144
  10. 60
  11. 200
  12. 296
  13. 76
  14. 172
  15. 168
  16. 56
  17. 284
  18. 128
  19. 132
  20. 184
  21. 168
  22. 240
  23. 224
  24. 260
  25. 104
  26. 52
  27. 112
  28. 152
  29. 128
  30. 160
  31. 312
  32. 48
  33. 176
  34. 288
  35. 208
  36. 220
  37. 216
  38. 188
  39. 248
  40. 140

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