1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 839 · 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 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 841. 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 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
7. 7.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 184: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.297 + 792 =
11. 11.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.693 + 396 =
13. 13.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.792 + 297 =
19. 19.594 + 495 =
20. 20.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.198 + 891 =
23. 23.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.891 + 198 =
27. 27.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 205: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 652. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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