1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 84 · 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 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. 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 7. What is that number?
6. 6.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.297 + 792 =
16. 16.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.198 + 891 =
19. 19.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 189: 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 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
33. 33.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 619: reverse and subtract, then reverse that answer and add. What do you get?

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