1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 228 · 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 5. What is that number?
2. 2.297 + 792 =
3. 3.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.396 + 693 =
8. 8.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.198 + 891 =
11. 11.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.891 + 198 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.792 + 297 =
26. 26.Do the 1089 trick with 833: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 683. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
31. 31.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 377: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.495 + 594 =
38. 38.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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