1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 353 · 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 220: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.891 + 198 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Do the 1089 trick with 916: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 578: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.792 + 297 =
13. 13.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.198 + 891 =
16. 16.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.396 + 693 =
18. 18.297 + 792 =
19. 19.Take 947. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 593: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 214: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
35. 35.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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