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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 234 · 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. 1.57 × 4 =
  2. 2.20 × 8 =
  3. 3.61 × 4 =
  4. 4.17 × 8 =
  5. 5.40 × 8 =
  6. 6.21 × 4 =
  7. 7.25 × 4 =
  8. 8.34 × 8 =
  9. 9.13 × 8 =
  10. 10.27 × 8 =
  11. 11.32 × 8 =
  12. 12.31 × 8 =
  13. 13.28 × 8 =
  14. 14.62 × 4 =
  15. 15.31 × 4 =
  16. 16.65 × 4 =
  17. 17.55 × 4 =
  18. 18.16 × 8 =
  19. 19.18 × 8 =
  20. 20.36 × 8 =
  21. 21.39 × 8 =
  22. 22.63 × 4 =
  23. 23.74 × 4 =
  24. 24.17 × 4 =
  25. 25.27 × 4 =
  26. 26.60 × 4 =
  27. 27.16 × 4 =
  28. 28.47 × 4 =
  29. 29.26 × 4 =
  30. 30.19 × 4 =
  31. 31.23 × 4 =
  32. 32.67 × 4 =
  33. 33.38 × 4 =
  34. 34.39 × 4 =
  35. 35.23 × 8 =
  36. 36.48 × 4 =
  37. 37.35 × 8 =
  38. 38.35 × 4 =
  39. 39.58 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 228
  2. 160
  3. 244
  4. 136
  5. 320
  6. 84
  7. 100
  8. 272
  9. 104
  10. 216
  11. 256
  12. 248
  13. 224
  14. 248
  15. 124
  16. 260
  17. 220
  18. 128
  19. 144
  20. 288
  21. 312
  22. 252
  23. 296
  24. 68
  25. 108
  26. 240
  27. 64
  28. 188
  29. 104
  30. 76
  31. 92
  32. 268
  33. 152
  34. 156
  35. 184
  36. 192
  37. 280
  38. 140
  39. 232
  40. 240

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