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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 290 · 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. 1.31 × 8 =
  2. 2.63 × 4 =
  3. 3.31 × 4 =
  4. 4.26 × 8 =
  5. 5.36 × 8 =
  6. 6.17 × 8 =
  7. 7.33 × 4 =
  8. 8.30 × 8 =
  9. 9.46 × 4 =
  10. 10.32 × 4 =
  11. 11.71 × 4 =
  12. 12.21 × 8 =
  13. 13.19 × 8 =
  14. 14.37 × 8 =
  15. 15.40 × 8 =
  16. 16.49 × 4 =
  17. 17.16 × 8 =
  18. 18.24 × 8 =
  19. 19.39 × 8 =
  20. 20.33 × 8 =
  21. 21.14 × 4 =
  22. 22.50 × 4 =
  23. 23.45 × 4 =
  24. 24.15 × 8 =
  25. 25.16 × 4 =
  26. 26.55 × 4 =
  27. 27.13 × 8 =
  28. 28.28 × 8 =
  29. 29.27 × 8 =
  30. 30.20 × 8 =
  31. 31.20 × 4 =
  32. 32.66 × 4 =
  33. 33.24 × 4 =
  34. 34.43 × 4 =
  35. 35.53 × 4 =
  36. 36.36 × 4 =
  37. 37.18 × 4 =
  38. 38.40 × 4 =
  39. 39.44 × 4 =
  40. 40.13 × 4 =

Answer key

  1. 248
  2. 252
  3. 124
  4. 208
  5. 288
  6. 136
  7. 132
  8. 240
  9. 184
  10. 128
  11. 284
  12. 168
  13. 152
  14. 296
  15. 320
  16. 196
  17. 128
  18. 192
  19. 312
  20. 264
  21. 56
  22. 200
  23. 180
  24. 120
  25. 64
  26. 220
  27. 104
  28. 224
  29. 216
  30. 160
  31. 80
  32. 264
  33. 96
  34. 172
  35. 212
  36. 144
  37. 72
  38. 160
  39. 176
  40. 52

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