← 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 191 · 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. 1.70 × 4 =
  2. 2.45 × 4 =
  3. 3.49 × 4 =
  4. 4.72 × 4 =
  5. 5.69 × 4 =
  6. 6.29 × 4 =
  7. 7.22 × 8 =
  8. 8.19 × 8 =
  9. 9.28 × 8 =
  10. 10.27 × 8 =
  11. 11.56 × 4 =
  12. 12.26 × 4 =
  13. 13.21 × 8 =
  14. 14.20 × 4 =
  15. 15.17 × 4 =
  16. 16.42 × 4 =
  17. 17.18 × 4 =
  18. 18.20 × 8 =
  19. 19.34 × 8 =
  20. 20.31 × 8 =
  21. 21.35 × 8 =
  22. 22.57 × 4 =
  23. 23.43 × 4 =
  24. 24.26 × 8 =
  25. 25.28 × 4 =
  26. 26.58 × 4 =
  27. 27.75 × 4 =
  28. 28.44 × 4 =
  29. 29.37 × 8 =
  30. 30.67 × 4 =
  31. 31.46 × 4 =
  32. 32.14 × 8 =
  33. 33.31 × 4 =
  34. 34.65 × 4 =
  35. 35.18 × 8 =
  36. 36.39 × 8 =
  37. 37.36 × 4 =
  38. 38.52 × 4 =
  39. 39.35 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 280
  2. 180
  3. 196
  4. 288
  5. 276
  6. 116
  7. 176
  8. 152
  9. 224
  10. 216
  11. 224
  12. 104
  13. 168
  14. 80
  15. 68
  16. 168
  17. 72
  18. 160
  19. 272
  20. 248
  21. 280
  22. 228
  23. 172
  24. 208
  25. 112
  26. 232
  27. 300
  28. 176
  29. 296
  30. 268
  31. 184
  32. 112
  33. 124
  34. 260
  35. 144
  36. 312
  37. 144
  38. 208
  39. 140
  40. 120

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