1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 227 · 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 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.396 + 693 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.297 + 792 =
9. 9.Take 792. 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 5. What is that number?
11. 11.495 + 594 =
12. 12.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Do the 1089 trick with 944: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 735: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.792 + 297 =
23. 23.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 943. 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 6. What is that number?
28. 28.693 + 396 =
29. 29.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 186. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
40. 40.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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