1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 317 · 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 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.198 + 891 =
6. 6.495 + 594 =
7. 7.594 + 495 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 822. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 679: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.693 + 396 =
17. 17.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 826: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.792 + 297 =
24. 24.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 472. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
40. 40.891 + 198 =

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