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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 823 · 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. 1.33 × 4 =
  2. 2.66 × 4 =
  3. 3.35 × 8 =
  4. 4.59 × 4 =
  5. 5.15 × 8 =
  6. 6.32 × 8 =
  7. 7.64 × 4 =
  8. 8.21 × 8 =
  9. 9.57 × 4 =
  10. 10.31 × 8 =
  11. 11.18 × 8 =
  12. 12.23 × 8 =
  13. 13.63 × 4 =
  14. 14.17 × 4 =
  15. 15.22 × 8 =
  16. 16.40 × 8 =
  17. 17.49 × 4 =
  18. 18.73 × 4 =
  19. 19.26 × 8 =
  20. 20.47 × 4 =
  21. 21.65 × 4 =
  22. 22.37 × 8 =
  23. 23.53 × 4 =
  24. 24.16 × 8 =
  25. 25.13 × 8 =
  26. 26.31 × 4 =
  27. 27.46 × 4 =
  28. 28.54 × 4 =
  29. 29.17 × 8 =
  30. 30.18 × 4 =
  31. 31.19 × 8 =
  32. 32.16 × 4 =
  33. 33.68 × 4 =
  34. 34.20 × 8 =
  35. 35.14 × 4 =
  36. 36.67 × 4 =
  37. 37.58 × 4 =
  38. 38.55 × 4 =
  39. 39.43 × 4 =
  40. 40.27 × 8 =

Answer key

  1. 132
  2. 264
  3. 280
  4. 236
  5. 120
  6. 256
  7. 256
  8. 168
  9. 228
  10. 248
  11. 144
  12. 184
  13. 252
  14. 68
  15. 176
  16. 320
  17. 196
  18. 292
  19. 208
  20. 188
  21. 260
  22. 296
  23. 212
  24. 128
  25. 104
  26. 124
  27. 184
  28. 216
  29. 136
  30. 72
  31. 152
  32. 64
  33. 272
  34. 160
  35. 56
  36. 268
  37. 232
  38. 220
  39. 172
  40. 216

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