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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 410 · 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. 1.15 × 8 =
  2. 2.43 × 4 =
  3. 3.65 × 4 =
  4. 4.30 × 8 =
  5. 5.62 × 4 =
  6. 6.33 × 4 =
  7. 7.74 × 4 =
  8. 8.21 × 8 =
  9. 9.73 × 4 =
  10. 10.14 × 8 =
  11. 11.46 × 4 =
  12. 12.16 × 4 =
  13. 13.33 × 8 =
  14. 14.35 × 8 =
  15. 15.29 × 8 =
  16. 16.36 × 8 =
  17. 17.70 × 4 =
  18. 18.32 × 4 =
  19. 19.67 × 4 =
  20. 20.19 × 8 =
  21. 21.18 × 8 =
  22. 22.30 × 4 =
  23. 23.25 × 8 =
  24. 24.68 × 4 =
  25. 25.56 × 4 =
  26. 26.31 × 8 =
  27. 27.26 × 4 =
  28. 28.18 × 4 =
  29. 29.25 × 4 =
  30. 30.14 × 4 =
  31. 31.58 × 4 =
  32. 32.23 × 8 =
  33. 33.19 × 4 =
  34. 34.63 × 4 =
  35. 35.40 × 4 =
  36. 36.32 × 8 =
  37. 37.47 × 4 =
  38. 38.45 × 4 =
  39. 39.42 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 120
  2. 172
  3. 260
  4. 240
  5. 248
  6. 132
  7. 296
  8. 168
  9. 292
  10. 112
  11. 184
  12. 64
  13. 264
  14. 280
  15. 232
  16. 288
  17. 280
  18. 128
  19. 268
  20. 152
  21. 144
  22. 120
  23. 200
  24. 272
  25. 224
  26. 248
  27. 104
  28. 72
  29. 100
  30. 56
  31. 232
  32. 184
  33. 76
  34. 252
  35. 160
  36. 256
  37. 188
  38. 180
  39. 168
  40. 192

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