1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 398 · 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 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 1. What is that number?
6. 6.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.792 + 297 =
13. 13.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.Do the 1089 trick with 571: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.495 + 594 =
21. 21.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.396 + 693 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
24. 24.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.297 + 792 =
28. 28.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.594 + 495 =
31. 31.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.693 + 396 =
34. 34.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?

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