1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 38 · 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 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 577: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 537. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.198 + 891 =
11. 11.792 + 297 =
12. 12.594 + 495 =
13. 13.495 + 594 =
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 793: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 582: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.891 + 198 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
20. 20.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
29. 29.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.693 + 396 =
35. 35.297 + 792 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.396 + 693 =
39. 39.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?

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