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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 1 · 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. 1.17 × 8 =
  2. 2.13 × 4 =
  3. 3.30 × 8 =
  4. 4.25 × 8 =
  5. 5.33 × 8 =
  6. 6.56 × 4 =
  7. 7.62 × 4 =
  8. 8.22 × 8 =
  9. 9.68 × 4 =
  10. 10.27 × 8 =
  11. 11.38 × 4 =
  12. 12.16 × 8 =
  13. 13.35 × 4 =
  14. 14.52 × 4 =
  15. 15.57 × 4 =
  16. 16.54 × 4 =
  17. 17.43 × 4 =
  18. 18.14 × 8 =
  19. 19.20 × 4 =
  20. 20.32 × 4 =
  21. 21.60 × 4 =
  22. 22.36 × 4 =
  23. 23.40 × 8 =
  24. 24.50 × 4 =
  25. 25.18 × 8 =
  26. 26.26 × 4 =
  27. 27.23 × 8 =
  28. 28.26 × 8 =
  29. 29.27 × 4 =
  30. 30.20 × 8 =
  31. 31.53 × 4 =
  32. 32.19 × 8 =
  33. 33.71 × 4 =
  34. 34.41 × 4 =
  35. 35.49 × 4 =
  36. 36.63 × 4 =
  37. 37.46 × 4 =
  38. 38.22 × 4 =
  39. 39.33 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 136
  2. 52
  3. 240
  4. 200
  5. 264
  6. 224
  7. 248
  8. 176
  9. 272
  10. 216
  11. 152
  12. 128
  13. 140
  14. 208
  15. 228
  16. 216
  17. 172
  18. 112
  19. 80
  20. 128
  21. 240
  22. 144
  23. 320
  24. 200
  25. 144
  26. 104
  27. 184
  28. 208
  29. 108
  30. 160
  31. 212
  32. 152
  33. 284
  34. 164
  35. 196
  36. 252
  37. 184
  38. 88
  39. 132
  40. 100

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