1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 153 · 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 920: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.693 + 396 =
3. 3.495 + 594 =
4. 4.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.891 + 198 =
6. 6.198 + 891 =
7. 7.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Take 503. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 783: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.594 + 495 =
20. 20.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.297 + 792 =
23. 23.792 + 297 =
24. 24.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
38. 38.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 437. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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