1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 284 · 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. 1.891 + 198 =
2. 2.Do the 1089 trick with 318: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.693 + 396 =
8. 8.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 296. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.198 + 891 =
36. 36.297 + 792 =
37. 37.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 987. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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