1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 130 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
2. 2.198 + 891 =
3. 3.297 + 792 =
4. 4.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 643. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 634. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Take 639. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.396 + 693 =
21. 21.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 914. 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.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.495 + 594 =
27. 27.792 + 297 =
28. 28.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.891 + 198 =
31. 31.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.594 + 495 =
38. 38.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?

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