1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 191 · 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.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 739: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.891 + 198 =
6. 6.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.198 + 891 =
10. 10.594 + 495 =
11. 11.693 + 396 =
12. 12.Take 210. 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 3. What is that number?
14. 14.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 603: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 955. 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 8. What is that number?
21. 21.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.Take 517. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 105: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.297 + 792 =
31. 31.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.792 + 297 =
33. 33.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.Do the 1089 trick with 266: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?

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