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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 600 · 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. 1.33 × 4 =
  2. 2.50 × 4 =
  3. 3.40 × 4 =
  4. 4.14 × 4 =
  5. 5.24 × 8 =
  6. 6.29 × 8 =
  7. 7.34 × 8 =
  8. 8.27 × 4 =
  9. 9.59 × 4 =
  10. 10.23 × 8 =
  11. 11.14 × 8 =
  12. 12.13 × 4 =
  13. 13.62 × 4 =
  14. 14.38 × 8 =
  15. 15.13 × 8 =
  16. 16.30 × 4 =
  17. 17.37 × 4 =
  18. 18.44 × 4 =
  19. 19.70 × 4 =
  20. 20.19 × 8 =
  21. 21.22 × 8 =
  22. 22.27 × 8 =
  23. 23.55 × 4 =
  24. 24.17 × 4 =
  25. 25.37 × 8 =
  26. 26.41 × 4 =
  27. 27.60 × 4 =
  28. 28.28 × 8 =
  29. 29.26 × 4 =
  30. 30.57 × 4 =
  31. 31.61 × 4 =
  32. 32.21 × 4 =
  33. 33.17 × 8 =
  34. 34.42 × 4 =
  35. 35.39 × 4 =
  36. 36.36 × 4 =
  37. 37.58 × 4 =
  38. 38.15 × 8 =
  39. 39.30 × 8 =
  40. 40.63 × 4 =

Answer key

  1. 132
  2. 200
  3. 160
  4. 56
  5. 192
  6. 232
  7. 272
  8. 108
  9. 236
  10. 184
  11. 112
  12. 52
  13. 248
  14. 304
  15. 104
  16. 120
  17. 148
  18. 176
  19. 280
  20. 152
  21. 176
  22. 216
  23. 220
  24. 68
  25. 296
  26. 164
  27. 240
  28. 224
  29. 104
  30. 228
  31. 244
  32. 84
  33. 136
  34. 168
  35. 156
  36. 144
  37. 232
  38. 120
  39. 240
  40. 252

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