1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 187 · 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 7. What is that number?
2. 2.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.693 + 396 =
4. 4.891 + 198 =
5. 5.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 289. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.198 + 891 =
13. 13.Do the 1089 trick with 477: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.792 + 297 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 884: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.297 + 792 =
31. 31.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 165: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.495 + 594 =
37. 37.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?

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