← 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 769 · 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. 1.37 × 4 =
  2. 2.49 × 4 =
  3. 3.23 × 8 =
  4. 4.25 × 4 =
  5. 5.61 × 4 =
  6. 6.75 × 4 =
  7. 7.14 × 8 =
  8. 8.16 × 8 =
  9. 9.53 × 4 =
  10. 10.37 × 8 =
  11. 11.41 × 4 =
  12. 12.32 × 8 =
  13. 13.39 × 8 =
  14. 14.22 × 8 =
  15. 15.27 × 4 =
  16. 16.71 × 4 =
  17. 17.29 × 4 =
  18. 18.68 × 4 =
  19. 19.25 × 8 =
  20. 20.34 × 8 =
  21. 21.18 × 4 =
  22. 22.12 × 4 =
  23. 23.38 × 8 =
  24. 24.19 × 4 =
  25. 25.57 × 4 =
  26. 26.67 × 4 =
  27. 27.15 × 8 =
  28. 28.45 × 4 =
  29. 29.17 × 4 =
  30. 30.60 × 4 =
  31. 31.46 × 4 =
  32. 32.18 × 8 =
  33. 33.54 × 4 =
  34. 34.20 × 8 =
  35. 35.28 × 4 =
  36. 36.36 × 8 =
  37. 37.16 × 4 =
  38. 38.65 × 4 =
  39. 39.29 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 148
  2. 196
  3. 184
  4. 100
  5. 244
  6. 300
  7. 112
  8. 128
  9. 212
  10. 296
  11. 164
  12. 256
  13. 312
  14. 176
  15. 108
  16. 284
  17. 116
  18. 272
  19. 200
  20. 272
  21. 72
  22. 48
  23. 304
  24. 76
  25. 228
  26. 268
  27. 120
  28. 180
  29. 68
  30. 240
  31. 184
  32. 144
  33. 216
  34. 160
  35. 112
  36. 288
  37. 64
  38. 260
  39. 232
  40. 320

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