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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 70 · 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. 1.37 × 8 =
  2. 2.35 × 4 =
  3. 3.14 × 4 =
  4. 4.20 × 8 =
  5. 5.22 × 8 =
  6. 6.15 × 8 =
  7. 7.13 × 8 =
  8. 8.29 × 8 =
  9. 9.46 × 4 =
  10. 10.21 × 4 =
  11. 11.49 × 4 =
  12. 12.67 × 4 =
  13. 13.16 × 8 =
  14. 14.52 × 4 =
  15. 15.44 × 4 =
  16. 16.24 × 4 =
  17. 17.18 × 8 =
  18. 18.19 × 8 =
  19. 19.12 × 8 =
  20. 20.59 × 4 =
  21. 21.21 × 8 =
  22. 22.18 × 4 =
  23. 23.31 × 8 =
  24. 24.27 × 8 =
  25. 25.72 × 4 =
  26. 26.41 × 4 =
  27. 27.12 × 4 =
  28. 28.69 × 4 =
  29. 29.40 × 8 =
  30. 30.28 × 4 =
  31. 31.26 × 4 =
  32. 32.15 × 4 =
  33. 33.74 × 4 =
  34. 34.30 × 4 =
  35. 35.39 × 8 =
  36. 36.57 × 4 =
  37. 37.28 × 8 =
  38. 38.25 × 4 =
  39. 39.14 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 296
  2. 140
  3. 56
  4. 160
  5. 176
  6. 120
  7. 104
  8. 232
  9. 184
  10. 84
  11. 196
  12. 268
  13. 128
  14. 208
  15. 176
  16. 96
  17. 144
  18. 152
  19. 96
  20. 236
  21. 168
  22. 72
  23. 248
  24. 216
  25. 288
  26. 164
  27. 48
  28. 276
  29. 320
  30. 112
  31. 104
  32. 60
  33. 296
  34. 120
  35. 312
  36. 228
  37. 224
  38. 100
  39. 112
  40. 168

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