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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 433 · 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. 1.27 × 4 =
  2. 2.17 × 8 =
  3. 3.23 × 4 =
  4. 4.32 × 8 =
  5. 5.37 × 4 =
  6. 6.60 × 4 =
  7. 7.39 × 4 =
  8. 8.53 × 4 =
  9. 9.26 × 8 =
  10. 10.16 × 8 =
  11. 11.63 × 4 =
  12. 12.29 × 8 =
  13. 13.21 × 8 =
  14. 14.40 × 8 =
  15. 15.26 × 4 =
  16. 16.54 × 4 =
  17. 17.74 × 4 =
  18. 18.25 × 8 =
  19. 19.42 × 4 =
  20. 20.34 × 8 =
  21. 21.14 × 4 =
  22. 22.12 × 4 =
  23. 23.57 × 4 =
  24. 24.15 × 8 =
  25. 25.13 × 4 =
  26. 26.24 × 8 =
  27. 27.13 × 8 =
  28. 28.65 × 4 =
  29. 29.49 × 4 =
  30. 30.36 × 8 =
  31. 31.45 × 4 =
  32. 32.30 × 4 =
  33. 33.24 × 4 =
  34. 34.31 × 8 =
  35. 35.38 × 8 =
  36. 36.59 × 4 =
  37. 37.19 × 8 =
  38. 38.40 × 4 =
  39. 39.23 × 8 =
  40. 40.27 × 8 =

Answer key

  1. 108
  2. 136
  3. 92
  4. 256
  5. 148
  6. 240
  7. 156
  8. 212
  9. 208
  10. 128
  11. 252
  12. 232
  13. 168
  14. 320
  15. 104
  16. 216
  17. 296
  18. 200
  19. 168
  20. 272
  21. 56
  22. 48
  23. 228
  24. 120
  25. 52
  26. 192
  27. 104
  28. 260
  29. 196
  30. 288
  31. 180
  32. 120
  33. 96
  34. 248
  35. 304
  36. 236
  37. 152
  38. 160
  39. 184
  40. 216

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