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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 738 · 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. 2.21 × 8 =
  3. 3.53 × 4 =
  4. 4.18 × 8 =
  5. 5.58 × 4 =
  6. 6.14 × 8 =
  7. 7.42 × 4 =
  8. 8.56 × 4 =
  9. 9.38 × 8 =
  10. 10.49 × 4 =
  11. 11.15 × 4 =
  12. 12.23 × 4 =
  13. 13.26 × 8 =
  14. 14.18 × 4 =
  15. 15.34 × 4 =
  16. 16.17 × 8 =
  17. 17.20 × 8 =
  18. 18.40 × 8 =
  19. 19.44 × 4 =
  20. 20.22 × 8 =
  21. 21.37 × 4 =
  22. 22.31 × 8 =
  23. 23.36 × 8 =
  24. 24.19 × 8 =
  25. 25.43 × 4 =
  26. 26.13 × 4 =
  27. 27.63 × 4 =
  28. 28.55 × 4 =
  29. 29.24 × 8 =
  30. 30.33 × 8 =
  31. 31.12 × 8 =
  32. 32.60 × 4 =
  33. 33.38 × 4 =
  34. 34.65 × 4 =
  35. 35.59 × 4 =
  36. 36.75 × 4 =
  37. 37.30 × 4 =
  38. 38.45 × 4 =
  39. 39.64 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 184
  2. 168
  3. 212
  4. 144
  5. 232
  6. 112
  7. 168
  8. 224
  9. 304
  10. 196
  11. 60
  12. 92
  13. 208
  14. 72
  15. 136
  16. 136
  17. 160
  18. 320
  19. 176
  20. 176
  21. 148
  22. 248
  23. 288
  24. 152
  25. 172
  26. 52
  27. 252
  28. 220
  29. 192
  30. 264
  31. 96
  32. 240
  33. 152
  34. 260
  35. 236
  36. 300
  37. 120
  38. 180
  39. 256
  40. 80

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