1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 147 · 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 3. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.792 + 297 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.891 + 198 =
6. 6.594 + 495 =
7. 7.297 + 792 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. 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.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 207. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.198 + 891 =
26. 26.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 856: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.495 + 594 =
33. 33.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.396 + 693 =
35. 35.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?

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