1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 160 · 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 460: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.297 + 792 =
7. 7.198 + 891 =
8. 8.891 + 198 =
9. 9.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 960. 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 2. What is that number?
13. 13.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
16. 16.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 440: 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 3. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 852. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 755: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.396 + 693 =
31. 31.Do the 1089 trick with 987: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 769. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.693 + 396 =
36. 36.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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