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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 71 · 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. 1.59 × 4 =
  2. 2.55 × 4 =
  3. 3.28 × 4 =
  4. 4.36 × 8 =
  5. 5.12 × 4 =
  6. 6.41 × 4 =
  7. 7.62 × 4 =
  8. 8.26 × 8 =
  9. 9.37 × 8 =
  10. 10.31 × 8 =
  11. 11.19 × 4 =
  12. 12.14 × 8 =
  13. 13.24 × 8 =
  14. 14.17 × 8 =
  15. 15.34 × 8 =
  16. 16.29 × 8 =
  17. 17.35 × 8 =
  18. 18.54 × 4 =
  19. 19.65 × 4 =
  20. 20.23 × 8 =
  21. 21.58 × 4 =
  22. 22.63 × 4 =
  23. 23.13 × 8 =
  24. 24.49 × 4 =
  25. 25.20 × 8 =
  26. 26.42 × 4 =
  27. 27.48 × 4 =
  28. 28.28 × 8 =
  29. 29.25 × 8 =
  30. 30.47 × 4 =
  31. 31.69 × 4 =
  32. 32.20 × 4 =
  33. 33.35 × 4 =
  34. 34.16 × 4 =
  35. 35.18 × 8 =
  36. 36.45 × 4 =
  37. 37.21 × 8 =
  38. 38.33 × 4 =
  39. 39.21 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 236
  2. 220
  3. 112
  4. 288
  5. 48
  6. 164
  7. 248
  8. 208
  9. 296
  10. 248
  11. 76
  12. 112
  13. 192
  14. 136
  15. 272
  16. 232
  17. 280
  18. 216
  19. 260
  20. 184
  21. 232
  22. 252
  23. 104
  24. 196
  25. 160
  26. 168
  27. 192
  28. 224
  29. 200
  30. 188
  31. 276
  32. 80
  33. 140
  34. 64
  35. 144
  36. 180
  37. 168
  38. 132
  39. 84
  40. 176

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