1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 170 · 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 990: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.198 + 891 =
3. 3.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 377: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.495 + 594 =
9. 9.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.594 + 495 =
11. 11.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 230: 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.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.396 + 693 =
20. 20.891 + 198 =
21. 21.Take 357. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 371. 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 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 710: 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 6. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Do the 1089 trick with 388: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
38. 38.Take 970. 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 8. What is that number?
40. 40.693 + 396 =

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