1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 159 · 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.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.198 + 891 =
4. 4.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.396 + 693 =
9. 9.792 + 297 =
10. 10.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.297 + 792 =
12. 12.693 + 396 =
13. 13.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 983: 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 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 538. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.594 + 495 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.495 + 594 =
33. 33.Take 179. 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.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 265: reverse and subtract, then reverse that answer and add. What do you get?

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