1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 180 · 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.Take 698. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.396 + 693 =
7. 7.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 893. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.594 + 495 =
14. 14.297 + 792 =
15. 15.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
24. 24.Do the 1089 trick with 365: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.891 + 198 =
26. 26.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
29. 29.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.198 + 891 =
33. 33.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.792 + 297 =
37. 37.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 916: reverse and subtract, then reverse that answer and add. What do you get?

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