1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 396 · 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. 1.891 + 198 =
2. 2.297 + 792 =
3. 3.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.594 + 495 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.495 + 594 =
16. 16.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.198 + 891 =
20. 20.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.792 + 297 =
22. 22.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 830: 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 7. What is that number?
25. 25.396 + 693 =
26. 26.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
35. 35.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
38. 38.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.693 + 396 =
40. 40.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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