1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 705 · 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 4. What is that number?
2. 2.693 + 396 =
3. 3.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.198 + 891 =
5. 5.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 719: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 507: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.Do the 1089 trick with 436: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.891 + 198 =
24. 24.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.495 + 594 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.594 + 495 =
30. 30.Do the 1089 trick with 355: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 417: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 216: 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. 35.297 + 792 =
36. 36.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?

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