1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 831 · 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 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.396 + 693 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.495 + 594 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.792 + 297 =
17. 17.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.693 + 396 =
19. 19.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.297 + 792 =
21. 21.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Take 800. 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 4. What is that number?
25. 25.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.198 + 891 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
31. 31.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 512: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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