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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 261 · 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. 1.12 × 8 =
  2. 2.33 × 8 =
  3. 3.12 × 4 =
  4. 4.62 × 4 =
  5. 5.31 × 8 =
  6. 6.18 × 4 =
  7. 7.20 × 8 =
  8. 8.26 × 4 =
  9. 9.28 × 8 =
  10. 10.24 × 4 =
  11. 11.24 × 8 =
  12. 12.18 × 8 =
  13. 13.34 × 4 =
  14. 14.16 × 8 =
  15. 15.69 × 4 =
  16. 16.15 × 4 =
  17. 17.27 × 8 =
  18. 18.61 × 4 =
  19. 19.17 × 8 =
  20. 20.52 × 4 =
  21. 21.46 × 4 =
  22. 22.72 × 4 =
  23. 23.21 × 4 =
  24. 24.22 × 8 =
  25. 25.37 × 4 =
  26. 26.48 × 4 =
  27. 27.15 × 8 =
  28. 28.36 × 8 =
  29. 29.40 × 8 =
  30. 30.53 × 4 =
  31. 31.23 × 8 =
  32. 32.14 × 8 =
  33. 33.41 × 4 =
  34. 34.30 × 4 =
  35. 35.68 × 4 =
  36. 36.63 × 4 =
  37. 37.26 × 8 =
  38. 38.16 × 4 =
  39. 39.21 × 8 =
  40. 40.28 × 4 =

Answer key

  1. 96
  2. 264
  3. 48
  4. 248
  5. 248
  6. 72
  7. 160
  8. 104
  9. 224
  10. 96
  11. 192
  12. 144
  13. 136
  14. 128
  15. 276
  16. 60
  17. 216
  18. 244
  19. 136
  20. 208
  21. 184
  22. 288
  23. 84
  24. 176
  25. 148
  26. 192
  27. 120
  28. 288
  29. 320
  30. 212
  31. 184
  32. 112
  33. 164
  34. 120
  35. 272
  36. 252
  37. 208
  38. 64
  39. 168
  40. 112

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