1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 281 · 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. 1.594 + 495 =
2. 2.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.198 + 891 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.495 + 594 =
14. 14.Do the 1089 trick with 476: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 238: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.396 + 693 =
20. 20.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 947. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.Take 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 503. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
40. 40.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?

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