1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 117 · 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. 1.297 + 792 =
2. 2.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.693 + 396 =
6. 6.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.Take 370. 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 4. What is that number?
11. 11.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 547. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Do the 1089 trick with 439: 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 7. What is that number?
17. 17.792 + 297 =
18. 18.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 925: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.594 + 495 =
27. 27.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.891 + 198 =
31. 31.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 276. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
35. 35.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.495 + 594 =
38. 38.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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