1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 50 · 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. 1.495 + 594 =
2. 2.Take 783. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 921: 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 1. What is that number?
9. 9.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.891 + 198 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 548: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.693 + 396 =
23. 23.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 137. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.792 + 297 =
27. 27.198 + 891 =
28. 28.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.396 + 693 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.594 + 495 =
33. 33.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
36. 36.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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