1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 40 · 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 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.891 + 198 =
8. 8.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.594 + 495 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.297 + 792 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 308: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.495 + 594 =
24. 24.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.198 + 891 =
39. 39.396 + 693 =
40. 40.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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