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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 736 · 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. 1.69 × 4 =
  2. 2.18 × 4 =
  3. 3.19 × 8 =
  4. 4.19 × 4 =
  5. 5.63 × 4 =
  6. 6.72 × 4 =
  7. 7.15 × 4 =
  8. 8.42 × 4 =
  9. 9.32 × 8 =
  10. 10.25 × 4 =
  11. 11.56 × 4 =
  12. 12.29 × 8 =
  13. 13.12 × 4 =
  14. 14.32 × 4 =
  15. 15.40 × 8 =
  16. 16.27 × 8 =
  17. 17.36 × 8 =
  18. 18.24 × 8 =
  19. 19.24 × 4 =
  20. 20.31 × 8 =
  21. 21.37 × 4 =
  22. 22.65 × 4 =
  23. 23.17 × 4 =
  24. 24.51 × 4 =
  25. 25.34 × 8 =
  26. 26.17 × 8 =
  27. 27.12 × 8 =
  28. 28.57 × 4 =
  29. 29.20 × 8 =
  30. 30.74 × 4 =
  31. 31.62 × 4 =
  32. 32.15 × 8 =
  33. 33.50 × 4 =
  34. 34.36 × 4 =
  35. 35.28 × 4 =
  36. 36.30 × 4 =
  37. 37.30 × 8 =
  38. 38.25 × 8 =
  39. 39.26 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 276
  2. 72
  3. 152
  4. 76
  5. 252
  6. 288
  7. 60
  8. 168
  9. 256
  10. 100
  11. 224
  12. 232
  13. 48
  14. 128
  15. 320
  16. 216
  17. 288
  18. 192
  19. 96
  20. 248
  21. 148
  22. 260
  23. 68
  24. 204
  25. 272
  26. 136
  27. 96
  28. 228
  29. 160
  30. 296
  31. 248
  32. 120
  33. 200
  34. 144
  35. 112
  36. 120
  37. 240
  38. 200
  39. 104
  40. 172

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