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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 881 · 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. 1.22 × 8 =
  2. 2.32 × 8 =
  3. 3.68 × 4 =
  4. 4.62 × 4 =
  5. 5.23 × 8 =
  6. 6.17 × 4 =
  7. 7.50 × 4 =
  8. 8.69 × 4 =
  9. 9.72 × 4 =
  10. 10.19 × 8 =
  11. 11.20 × 8 =
  12. 12.31 × 4 =
  13. 13.12 × 8 =
  14. 14.25 × 8 =
  15. 15.24 × 8 =
  16. 16.36 × 8 =
  17. 17.56 × 4 =
  18. 18.13 × 4 =
  19. 19.24 × 4 =
  20. 20.55 × 4 =
  21. 21.67 × 4 =
  22. 22.22 × 4 =
  23. 23.37 × 8 =
  24. 24.40 × 4 =
  25. 25.52 × 4 =
  26. 26.61 × 4 =
  27. 27.53 × 4 =
  28. 28.40 × 8 =
  29. 29.15 × 8 =
  30. 30.59 × 4 =
  31. 31.57 × 4 =
  32. 32.27 × 8 =
  33. 33.34 × 8 =
  34. 34.28 × 8 =
  35. 35.47 × 4 =
  36. 36.14 × 4 =
  37. 37.27 × 4 =
  38. 38.16 × 8 =
  39. 39.37 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 176
  2. 256
  3. 272
  4. 248
  5. 184
  6. 68
  7. 200
  8. 276
  9. 288
  10. 152
  11. 160
  12. 124
  13. 96
  14. 200
  15. 192
  16. 288
  17. 224
  18. 52
  19. 96
  20. 220
  21. 268
  22. 88
  23. 296
  24. 160
  25. 208
  26. 244
  27. 212
  28. 320
  29. 120
  30. 236
  31. 228
  32. 216
  33. 272
  34. 224
  35. 188
  36. 56
  37. 108
  38. 128
  39. 148
  40. 104

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