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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 63 · 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. 1.14 × 8 =
  2. 2.49 × 4 =
  3. 3.52 × 4 =
  4. 4.56 × 4 =
  5. 5.36 × 8 =
  6. 6.21 × 8 =
  7. 7.37 × 8 =
  8. 8.32 × 8 =
  9. 9.16 × 8 =
  10. 10.30 × 8 =
  11. 11.17 × 4 =
  12. 12.13 × 4 =
  13. 13.15 × 4 =
  14. 14.35 × 4 =
  15. 15.29 × 8 =
  16. 16.71 × 4 =
  17. 17.25 × 4 =
  18. 18.38 × 8 =
  19. 19.33 × 8 =
  20. 20.24 × 8 =
  21. 21.34 × 8 =
  22. 22.15 × 8 =
  23. 23.60 × 4 =
  24. 24.55 × 4 =
  25. 25.57 × 4 =
  26. 26.31 × 8 =
  27. 27.28 × 8 =
  28. 28.65 × 4 =
  29. 29.30 × 4 =
  30. 30.20 × 8 =
  31. 31.41 × 4 =
  32. 32.14 × 4 =
  33. 33.32 × 4 =
  34. 34.19 × 8 =
  35. 35.42 × 4 =
  36. 36.18 × 8 =
  37. 37.27 × 4 =
  38. 38.40 × 8 =
  39. 39.74 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 112
  2. 196
  3. 208
  4. 224
  5. 288
  6. 168
  7. 296
  8. 256
  9. 128
  10. 240
  11. 68
  12. 52
  13. 60
  14. 140
  15. 232
  16. 284
  17. 100
  18. 304
  19. 264
  20. 192
  21. 272
  22. 120
  23. 240
  24. 220
  25. 228
  26. 248
  27. 224
  28. 260
  29. 120
  30. 160
  31. 164
  32. 56
  33. 128
  34. 152
  35. 168
  36. 144
  37. 108
  38. 320
  39. 296
  40. 176

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