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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 387 · 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. 1.23 × 8 =
  2. 2.70 × 4 =
  3. 3.29 × 8 =
  4. 4.44 × 4 =
  5. 5.69 × 4 =
  6. 6.28 × 8 =
  7. 7.37 × 4 =
  8. 8.25 × 8 =
  9. 9.68 × 4 =
  10. 10.13 × 8 =
  11. 11.31 × 8 =
  12. 12.17 × 8 =
  13. 13.20 × 4 =
  14. 14.59 × 4 =
  15. 15.37 × 8 =
  16. 16.55 × 4 =
  17. 17.20 × 8 =
  18. 18.57 × 4 =
  19. 19.26 × 8 =
  20. 20.43 × 4 =
  21. 21.28 × 4 =
  22. 22.27 × 4 =
  23. 23.18 × 8 =
  24. 24.24 × 4 =
  25. 25.48 × 4 =
  26. 26.15 × 4 =
  27. 27.47 × 4 =
  28. 28.25 × 4 =
  29. 29.40 × 4 =
  30. 30.50 × 4 =
  31. 31.21 × 8 =
  32. 32.30 × 4 =
  33. 33.29 × 4 =
  34. 34.19 × 4 =
  35. 35.33 × 4 =
  36. 36.61 × 4 =
  37. 37.16 × 4 =
  38. 38.34 × 8 =
  39. 39.19 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 184
  2. 280
  3. 232
  4. 176
  5. 276
  6. 224
  7. 148
  8. 200
  9. 272
  10. 104
  11. 248
  12. 136
  13. 80
  14. 236
  15. 296
  16. 220
  17. 160
  18. 228
  19. 208
  20. 172
  21. 112
  22. 108
  23. 144
  24. 96
  25. 192
  26. 60
  27. 188
  28. 100
  29. 160
  30. 200
  31. 168
  32. 120
  33. 116
  34. 76
  35. 132
  36. 244
  37. 64
  38. 272
  39. 152
  40. 292

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