1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 145 · 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 764: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.396 + 693 =
14. 14.Do the 1089 trick with 477: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 245: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.198 + 891 =
19. 19.297 + 792 =
20. 20.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Do the 1089 trick with 577: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.891 + 198 =
32. 32.594 + 495 =
33. 33.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 795. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?

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