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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 253 · 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. 1.23 × 8 =
  2. 2.19 × 4 =
  3. 3.16 × 8 =
  4. 4.58 × 4 =
  5. 5.42 × 4 =
  6. 6.28 × 8 =
  7. 7.35 × 8 =
  8. 8.60 × 4 =
  9. 9.17 × 8 =
  10. 10.14 × 4 =
  11. 11.73 × 4 =
  12. 12.33 × 8 =
  13. 13.57 × 4 =
  14. 14.46 × 4 =
  15. 15.20 × 4 =
  16. 16.34 × 4 =
  17. 17.30 × 4 =
  18. 18.19 × 8 =
  19. 19.26 × 8 =
  20. 20.62 × 4 =
  21. 21.47 × 4 =
  22. 22.22 × 8 =
  23. 23.12 × 8 =
  24. 24.14 × 8 =
  25. 25.29 × 4 =
  26. 26.37 × 8 =
  27. 27.71 × 4 =
  28. 28.40 × 4 =
  29. 29.30 × 8 =
  30. 30.22 × 4 =
  31. 31.61 × 4 =
  32. 32.23 × 4 =
  33. 33.21 × 8 =
  34. 34.31 × 8 =
  35. 35.32 × 4 =
  36. 36.33 × 4 =
  37. 37.37 × 4 =
  38. 38.65 × 4 =
  39. 39.31 × 4 =
  40. 40.15 × 4 =

Answer key

  1. 184
  2. 76
  3. 128
  4. 232
  5. 168
  6. 224
  7. 280
  8. 240
  9. 136
  10. 56
  11. 292
  12. 264
  13. 228
  14. 184
  15. 80
  16. 136
  17. 120
  18. 152
  19. 208
  20. 248
  21. 188
  22. 176
  23. 96
  24. 112
  25. 116
  26. 296
  27. 284
  28. 160
  29. 240
  30. 88
  31. 244
  32. 92
  33. 168
  34. 248
  35. 128
  36. 132
  37. 148
  38. 260
  39. 124
  40. 60

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