1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 804 · 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. 1.297 + 792 =
2. 2.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.495 + 594 =
6. 6.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.792 + 297 =
8. 8.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.693 + 396 =
17. 17.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
20. 20.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 358. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.198 + 891 =
23. 23.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.396 + 693 =
26. 26.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.594 + 495 =
40. 40.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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