1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 86 · 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 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.198 + 891 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.891 + 198 =
10. 10.Take 532. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.495 + 594 =
13. 13.792 + 297 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
18. 18.Take 865. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.693 + 396 =
27. 27.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 811. 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 7. What is that number?
34. 34.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 517: reverse and subtract, then reverse that answer and add. What do you get?

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