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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 535 · 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. 1.29 × 8 =
  2. 2.48 × 4 =
  3. 3.12 × 8 =
  4. 4.74 × 4 =
  5. 5.35 × 8 =
  6. 6.17 × 8 =
  7. 7.57 × 4 =
  8. 8.36 × 8 =
  9. 9.13 × 8 =
  10. 10.59 × 4 =
  11. 11.15 × 8 =
  12. 12.19 × 8 =
  13. 13.67 × 4 =
  14. 14.18 × 4 =
  15. 15.42 × 4 =
  16. 16.37 × 8 =
  17. 17.39 × 8 =
  18. 18.52 × 4 =
  19. 19.33 × 8 =
  20. 20.14 × 8 =
  21. 21.65 × 4 =
  22. 22.16 × 4 =
  23. 23.14 × 4 =
  24. 24.26 × 8 =
  25. 25.40 × 8 =
  26. 26.58 × 4 =
  27. 27.43 × 4 =
  28. 28.49 × 4 =
  29. 29.15 × 4 =
  30. 30.29 × 4 =
  31. 31.32 × 8 =
  32. 32.34 × 4 =
  33. 33.71 × 4 =
  34. 34.17 × 4 =
  35. 35.63 × 4 =
  36. 36.50 × 4 =
  37. 37.18 × 8 =
  38. 38.12 × 4 =
  39. 39.47 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 232
  2. 192
  3. 96
  4. 296
  5. 280
  6. 136
  7. 228
  8. 288
  9. 104
  10. 236
  11. 120
  12. 152
  13. 268
  14. 72
  15. 168
  16. 296
  17. 312
  18. 208
  19. 264
  20. 112
  21. 260
  22. 64
  23. 56
  24. 208
  25. 320
  26. 232
  27. 172
  28. 196
  29. 60
  30. 116
  31. 256
  32. 136
  33. 284
  34. 68
  35. 252
  36. 200
  37. 144
  38. 48
  39. 188
  40. 192

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