1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 277 · 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. 1.594 + 495 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.495 + 594 =
12. 12.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.396 + 693 =
18. 18.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.297 + 792 =
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 449: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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