← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 656 · 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. 1.45 × 4 =
  2. 2.40 × 8 =
  3. 3.61 × 4 =
  4. 4.67 × 4 =
  5. 5.21 × 8 =
  6. 6.18 × 4 =
  7. 7.12 × 4 =
  8. 8.71 × 4 =
  9. 9.15 × 8 =
  10. 10.12 × 8 =
  11. 11.16 × 4 =
  12. 12.37 × 8 =
  13. 13.19 × 8 =
  14. 14.33 × 4 =
  15. 15.13 × 4 =
  16. 16.24 × 8 =
  17. 17.62 × 4 =
  18. 18.13 × 8 =
  19. 19.27 × 8 =
  20. 20.18 × 8 =
  21. 21.54 × 4 =
  22. 22.36 × 8 =
  23. 23.46 × 4 =
  24. 24.34 × 8 =
  25. 25.25 × 4 =
  26. 26.59 × 4 =
  27. 27.40 × 4 =
  28. 28.52 × 4 =
  29. 29.31 × 8 =
  30. 30.44 × 4 =
  31. 31.28 × 4 =
  32. 32.23 × 8 =
  33. 33.26 × 4 =
  34. 34.42 × 4 =
  35. 35.28 × 8 =
  36. 36.56 × 4 =
  37. 37.33 × 8 =
  38. 38.30 × 8 =
  39. 39.35 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 180
  2. 320
  3. 244
  4. 268
  5. 168
  6. 72
  7. 48
  8. 284
  9. 120
  10. 96
  11. 64
  12. 296
  13. 152
  14. 132
  15. 52
  16. 192
  17. 248
  18. 104
  19. 216
  20. 144
  21. 216
  22. 288
  23. 184
  24. 272
  25. 100
  26. 236
  27. 160
  28. 208
  29. 248
  30. 176
  31. 112
  32. 184
  33. 104
  34. 168
  35. 224
  36. 224
  37. 264
  38. 240
  39. 140
  40. 256

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths