1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 660 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.495 + 594 =
8. 8.396 + 693 =
9. 9.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.891 + 198 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.594 + 495 =
35. 35.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.198 + 891 =
39. 39.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.792 + 297 =

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