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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 148 · 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. 1.35 × 4 =
  2. 2.26 × 8 =
  3. 3.75 × 4 =
  4. 4.62 × 4 =
  5. 5.16 × 8 =
  6. 6.17 × 8 =
  7. 7.57 × 4 =
  8. 8.55 × 4 =
  9. 9.14 × 8 =
  10. 10.35 × 8 =
  11. 11.30 × 8 =
  12. 12.69 × 4 =
  13. 13.18 × 4 =
  14. 14.13 × 4 =
  15. 15.28 × 4 =
  16. 16.20 × 4 =
  17. 17.19 × 8 =
  18. 18.17 × 4 =
  19. 19.48 × 4 =
  20. 20.45 × 4 =
  21. 21.37 × 4 =
  22. 22.27 × 4 =
  23. 23.32 × 4 =
  24. 24.37 × 8 =
  25. 25.22 × 8 =
  26. 26.60 × 4 =
  27. 27.12 × 4 =
  28. 28.42 × 4 =
  29. 29.23 × 4 =
  30. 30.32 × 8 =
  31. 31.68 × 4 =
  32. 32.34 × 8 =
  33. 33.44 × 4 =
  34. 34.19 × 4 =
  35. 35.22 × 4 =
  36. 36.36 × 8 =
  37. 37.21 × 4 =
  38. 38.56 × 4 =
  39. 39.54 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 140
  2. 208
  3. 300
  4. 248
  5. 128
  6. 136
  7. 228
  8. 220
  9. 112
  10. 280
  11. 240
  12. 276
  13. 72
  14. 52
  15. 112
  16. 80
  17. 152
  18. 68
  19. 192
  20. 180
  21. 148
  22. 108
  23. 128
  24. 296
  25. 176
  26. 240
  27. 48
  28. 168
  29. 92
  30. 256
  31. 272
  32. 272
  33. 176
  34. 76
  35. 88
  36. 288
  37. 84
  38. 224
  39. 216
  40. 224

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